When I was restoring my 73 Challenger I looked high and low for a decent set of bumper bracket to frame bolts. The AMK catalogue did list them but as "coming soon". I checked back with them 3x thru 2013 and they still were not available. I checked again today, and guess what, they are now available. Order number is B-13463, they are in packages of 3 and they are $20. I placed my order today, enough to replace the ugly ones on the 73, and the very rusty pitted ones on the 70. My 73 project is now complete, finally.
