Nisi or Fiamme tubular rims will work nicely with that bike, and so will Super Champions (Super Champion eventually became or merged with Wolber, maybe in the late 70's). the "Arc en ciel" model was very popular, all the way into the early 80's. Prices on NOS or used rims of such are readily available in eBay, They used to be affordable enough, but the "rediscovery" of tubular tires by many riders seem to be starting to drive their prices up quite a bit, the last time I checked, especailly for NOS ones. What ever rims you do get, just make sure you get silver/clear anodized rims and nothing dark/color anodized which came out in the 80's. I think some companies might have produced gold color anodized rims in the 70's though, but I suspect not too many. So those could be open for consideration too.
Chombi