I was wondering if anyone knew of any websites or anything where i can find really fun catchy blues, swing or jazz riffs for bass

sorry, but no I don't know of any.

Besides, the blues is what you feel, not what you read.

p.s. it's a real website, don't bother going.
-Fender Deluxe Active P-bass (60th anniversary)
-Peavey T-40 (1982)
-Hartke HA-3500
-Aguilar GS 2x12
-GK Backline 2x10