Have you considered making any other products besides "Marshall clones"?
There seems to be alot of us out here with old fenders, and there is a lot of old fenders out there cheap that guys would love to mod. I know that I would personally LOVE to pick up another Fender or two and do a Vibroverb, and also do a Dumble mod, but I only know of one guy doing the Dumble type thing...and at $799 + for the mod...to pricey for my wallet.
Maybe even new boards for Bassmans with the AA864 on the Normal channel, and a plexi style circuit on the bass channel....
Just some thought from a cheap guy
Ken