I'm having trouble finding some parts for my '65 Aztec. First my brake reservoir cap has no more threads at all. Is there any replacements, new surplus reservoirs or new design replacements any knows about or heard of? Second I can't seem to find a nose gear upstop bumper replacement. The parts book shows it as an assembly but I wonder if there is a bumper material replacement only that I haven't come across. Any help on the matter I'd appreciate.