For what it's worth, I think you're wrong:
I've seen pics of your Crowther before & it's a design classic - in fact, it is pretty close to perfection: G40's included!
Elegant & subtle. All the best classic parts together. Just the right amount of chrome, panto's, bands, stripes & general frills, etc., but never actually too bling - which is the point here: Your front & rear ends are all chrome - you add polished wheels as well & it's too much! The black (or anodised grey or whatever) is just the right balance.
I have much respect for your opinion & you may prove me wrong - but if you just can't help tinkering then maybe just pop some white bar tape on or whatever.
PS. If you really are set on new rims it has to be eBay, Gumtree or one of the forums doesn't it?
Just need a whole load of patience & you'll eventually get the right thing at the right price.
There's always Hilary Stone, Steel Vintage or these folks I came across recently:http://bike-vintage.com/29-wheels