Paintball, Skateboard, Airsoft, Apparel and Snowboard Gear at ActionVillage.com is a great place to buy.
As for the Trilogies, some people like them, most true cocker lovers hate them. They are a simple/dumbed down cocker. So you are limited to what all you can do with them. Unless you modify them.
It will be hard to find an autococker for a good price on a new website, other than a trilogy. So I suggest looking for a used one on here and
PbNation - Paintball's Home Page . You can probably get one like your old STO for ~$100.