I bought mine off of eBay from a seller in New York. Of course, I hope you can find a local seller. Try searching for "scalpel blades".
http://cgi.ebay.com/ws/eBayISAPI.dll...EAFB%3AIT&rd=1
The seller combined shipping with the handle and another box of 100 blades so the shipping did not seem so bad in the end.
Each blade also comes individually wrapped so you don't have to worry too much about rusting during storage of so many blades. Again, they are
VERY:eek: sharp so take extra caution when having these around.
Also they are sterilized with gamma radiation - like the Incredible Hulk
Going to paint a shell this weekend. Wish me luck!