26 Oct 2012, 18:07
I think the module that you require is the Hughes 25mm, that module was used by several different manufacturers e.g. CompuChron, Baylor, MS, Wittnauer, Accurist etc, so it might be worth keeping an eye out on eBay for an old beater with a working module. I had a quick look and there are at least a couple on eBay right now but probably not at the price you would want to pay.