We discussed sources for Weinmann and Dia Compe generic brake hoods a few months back, and I posted this ebay seller who offers very inexpensive transluscent gum hoods with no logos, and has been doing this for the past ~4 years on ebay.
glenvillevariety105
It's always good to search the archive before posting a question. Here are the results of searching the archive for "Weinmann and Hoods":
http://search.bikelist.org/
In fact, result #10 in the search would take you to an auction for these generic hoods - we just discussed this topic 6 months ago, in October 2009. However, I see that the auction is probably expired and so the name, "glenvillevariety105", was not easy to find with a bikelist search. I found the seller using my EBay feedback profile (I always write down the type of item I have bought when leaving feedback), as his Ebay auctions have a very counter-intuitive name.
- Don Gillies
San Diego, CA, USA