I'm from Peloponnese, in Greece there are four Challengers that i know of including mine. Anyway, i searched A LOT on the internet for parts in Europe first. The prices were more expensive than what i found in the US INCLUDING shipping. Whatever i bought (except tires which came from Germany and paint - primer - screws - insulation etc, stuff that could be bought from here) i bought from the US. I made a prepaid card from my bank, created a Paypal account and then made an account on Ebay. Here are the shops that i bought from :
http://www.ebay.com/rpp/motors-parts-accessories (Most important place, in my opinion, to buy the needed things for you Challenger, type the parts you want and you search the adds for what suites best with price and shipping cost)
http://stores.ebay.com/SYLVAIN-STAMP-PART-A-E-B-C-BODY-OEM?_rdc=1 (Very important place to buy used E-Body parts, seat belts - wiper arms - fuzzys - marker lights - door panel clips are among the items i bought, Sylvain has a lot of items, i always sent him a message to ask what i wanted because the Ebay list is just a fraction of what he really has)
http://www.rtspecialties.net/ (Whatever small thing you need to buy, restoration like, those guys have it, be sure to make a large list because the shipping is a little expensive for just one or two items)
http://www.billrolikenterprises.com/ (Also for small things but more like mechanical, seals, brake parts, hoses etc, with very reasonable shipping too)
https://www.herbsparts.com/ (I learned about it, by this site to use it for interior paint. Although the paint is great, i found that you can buy some good stuff here, i bought a package tray and four speed sonsole also, with reasonable shipping for their size)
http://www.amazon.com/automotive-auto-truck-replacements-parts/b/ref=nav_shopall_apa?ie=UTF8&node=15684181 (While this seems out of line, i found some parts here for a little less shipping than Ebay, needs account also)
http://stores.ebay.com/TPnTF/Challenger-/_i.html?rt=nc&_dmd=1&_fsub=521268119&_sid=108517949&_sticky=1&_trksid=p4634.c0.m14&_vc=1&_sop=16&_sc=1 [It is a Ebay store with sheet metal, i haven't bought from here, but it's the only store that provides sheet metal with adequate shipping price (import charges added
), maybe another member would tell us about quality]
In my humble opinion, Ebay is the best site but you must take a look at other sites for lower prices and shipping cost. There are here members from Netherlands, Sweden, Norway, Germany that could help if they have parts, or know about Europe stores that i don't. In addition, as you see here, there are a lot of stores that are beeing advertised and suggested. My first priority was to find the part with reasonable shipping to Greece and know the whole price before i buy it. So some stores might not have shipping there or it's too difficult to complete a transaction because the shipping cost adds after you complete the purchase etc...
My car was originally a 318 SE Challenger like yours, when i bought it, the vinyl top was stripped and a 440 four speed from a A12 Roadrunner was installed, unfortunately the 318 a/t drivetrain was long gone, so that's the only parts i have now that i don't need :
SE back window, with damaged plug
Power steering box (car had original power steering)
Automatic console plate
Original starter, but i think is for a 440 big block