Don, some of the sharpest work I've ever seen in your stated range is from a lens I have a hard time getting $20 bucks for. The lowly Tominon 127mm f4.7 was designed to do precisesly what you've described. If you really get to looking at the resolution under a 50X scope, these little lenses are just incredible. Yep, I have some elements for you. They fit any Copal 1 shutter. Send $15 bucks including shipping.
Absolutely! A wonderful little set of elements so long as the user remembers that close up doesn't mean big magnification. I, in a series of frustrating blonde moments, couldn't figure that out until one day it finally dawned.