I totally understand the concerns. However, I have actually had a good experience thus far ordering from Jerry. In addition to the header last year, this last week I ordered mufflers. The ones specific for a '79 R65 were not available, so I took a chance and ordered the ones he had that were listed for other airheads of the same vintage (I may have ordered his last pair).
The description of these seemed similar to that of JCWhitney and Mac. I installed them this evening (actually last evening as it is now morning), and if the pictures come through, they mounted just fine. While they are about 2 inches longer or so, and don't have the exact bends, they fit fine and, more importantly, my Krauser cases fit. The picture with my helmet is of the original mufflers, and all others are of the replacements.
Randy