Yep, sorry all - this is 650c... (title amended)
@Sig_Arlecchino - noice. Would love a normal proportioned version one of these! The paint on yours has survived much better than on mine.
So I've pretty much got everything. The wheels were a total nightmare, I scoured ebay since I got the frame for some suitable clinchers as I really didn't want to go tubs. I can tell you the interesting sets rarely come up, especially as a pair. I even signed up to some triathlon forums and asked on there but no dice. @pazu eventually put me on to these HEDs and I ended up getting them last month from a guy in Germany....
I ideally didn't want to go down that route, as pazu has these already himself, and I see @dry also did this a few years back. But these were too good to turn down and the hunt was way too long and painful. Farsports do 650c rims, so that was another train of thought but it would have been an expensive option.
The wheel saga is not over though - will update later.