throwout bearing in 6 spd???

i put a new clutch in my car about a year ago, i think i got it from advance. anyway, went to push the clutch in the other day n made a loud pop noise. took the trans out n the throwout brg. had seperated on the back side where the fork pulls against. i only have about 10,000 miles on this clutch. i was wondering if anyone had this problem ever. i dont know if i should buy a new brg. $130, a new set $200, or buy a better brand $500+........thanks