HotGolf from ClubGTI builds them for about 500, I've just had stealth to do mine, but i supplied both gearboxes, new bearings, seals and ARP diff bolts.... I know know that I have a really strong gearbox, however like any second hand box, you just dont know the condition of it swings and roundabouts... not sure what the gear ratio's are like for the V5's though, but i highly recommend the 3.68 modification in a VR box...