Most companies will produce both 650 an 700 rims, its pretty common size, Craigslist and Ebay will have them and most likely any online bike shop or most local bikes shops too. Your just gonna have to start looking around or calling some shops, it shouldn't be too hard. As far as affordable, that all depends, you never actually said what "affordable" was for you, so maybe that is why your "specific question" was never answered. Wienmann and Sun both make reasonably cheap rims and are fairly easy to find, Velocity, Mavic, and others can get expensive. The hubs are what really make the difference on pricing, you can get Formula hubs or something like that for around $50 or $60 bucks, Dura Ace hubs are also really good, the usually run closer to $120, and if you really want to break the bank you could go with Campagnolo or Phil Woods, but those are in no way cheap. Then there are spokes which are a dollar or so a piece, but you can always look for pre built wheels, and save yourself the hassle of lacing them, but that too will cost you a little bit more.
Last edited by kingcounty07; 12-19-08 at 02:40 PM.