Hmm... you mean stuff like Smith Tanks, Winship controls, Bruline air filters, Bolly Props, K&B1L glow plugs, Robart Horny Hinges, Klett hinges, various formulae dopes, real 1 hour epoxy, Pica Glu-it, sharp #11's, Dremel saw's, Prather pitch guages, Prather pink fuel tubing, Johnson(?) headers, Monokote that works, K&S wire that doesn't fracture, Rocket City, lead rosin core solder, etc? LOL!
I bet this list could be added to quite a bit by others with their own pet peeves too.