Not necessarily "period correct", but St John Street Cycles have a range of Ryde rims, and other manufacturers:
Rims - 26' - 559 | Rims & Tape | Wheels | SJS Cycles
By far the most common 26' wheel type nowwww.sjscycles.co.uk
PmYeah I know Thanks
I have some Halo Whiteline already but I just want to see what's out there.