Look for a Polaroid MP-4 stand. If you get one, you'll also need the universal camera mount, these are usually harder to find and more expensive than the stand.

I've got many useful ideas from Tupholme, C. H. S. Colour Photomicrography With A 35-MM Camera. 1961. Faber and Faber, London. 164 pp. Try the on-line book-finding services.