Originally Posted by
plonz
Currently building a bike without micro-adjuster screw holes and am wondering where I may be able to find some of these.
The ones you have pictured are Huret ref. 849 "Alignment stops":
Huret catalog (1974)
If you don't mind something similar then a newly manufactured copy of a Japanese version of these is being offered here:
Rear Drop Out Spacers 2 Alloy Lovecitycycles USA New | eBay
An original Japanese version (one only) is offered here:
http://www.ebay.com/itm/141766743024]
If you do need the actual Huret version you pictured they do turn up on eBay from time to time.