All the young sailors who have Optimists in this part of the country, buy them from Vanguard. In fact, Vanguard builds all Optimists here and sells them to other companies to sell. It is better to buy directly from the builder - they can customize the boat any way you like.
Mr. Bob Adam is the man who sells Optis for Vanguard. I thought his son was a Optimist champ, but I meant someone else - sorry. Here's a website that explains some local regattas with Optis, the NorthSails One Designs
I know this boy's dad (his picture is below). He has won many regattas and sails a Vanguard Opti: