Try The Path in Tustin.
+1 for Bike Improve. Nir (the owner) know his stuff!thesergeant said:Bike Improve (http://www.bike-improve.com/) sells them. In fact, last time I was in there he had a small Mach 5, totally pimped out on the sales floor.
The owner is probably one of the best mechanics in town too. I got my Pivot 429 through him and couldn't be happier.