Where to get a gearbox rebuilt/replaced
 

Hi all,

I have 1999 Import Subaru Impreza Type RA limited edition 555 and have blown up third gear lol , Just wondered if it worth getting it re-built or getting it replaced but dont know whats the best gearbox for it, and wheres the best place to go to get either? if possible south east/midlands

Thanks in Advance