Gene Gregory does great ring adapters, shaker baseplates, and bubbles.
Gene's hoods use old hoods, so it's good metal, but could be hard to find in good condition.
I have the AMD repops, and I think they're good. Spot welds (too small and deep) don't look OEM, but you can smooth those out and create your own fake OEM spot welds (wide and shallow). Get one w/o a trim ring and get a BEA trim ring (for cudas that is). Got the AMD one for my Challenger.
Your best bet is to get RestoRick/Domingo shaker conversion and use your own hood and have someone local do it. Best to have a real shaker side-by-side when doing the conversion to compare details. I'm doing this for my Cuda.
I wouldn't bother with any shakerhood.com stuff unless you can get an adapter ring/baseplate for cheaper. Doubt it though.