Help i'm stuck, need suggestions!

[Scrapla]

Ok I have a alright modded 90gt but i'm stuck on the tranny its grinding goin into 2nd, I just had a clutch installed to, it only grinds into goin into 2nd and I cant afford a performance tranny, I do have someone that says they'll rebuild it for about $400-$500 depending on how fucked up it is, Ive seen the rebuild kit but I work way to much and hardly have time to even maintain my car let alone replace a tranny someone please help, is there anyway I can buy the internals from a performance tranny and have someone install them in my stock beat up T5 , This car is my daily driver and id like to goto the track maybe 2-3 times a year and still be fine to drive everyday someone please help me out i'm on a tight budget and need to do something with this tranny soon.