Pulled my t5 gearbox from my el apart to change a synchro only to find a tooth is somehow damaged on the input shaft main gear. If anyone had a spare from a written off box i would like to purchase

You may be better off hunting down a complete second hand box - I doubt that there are many people that would be selling individual parts off a gearbox.

I had my input shaft replaced last year (along with getting the whole box reco'd). It was $4XX for a new input shaft alone - I can't remember the exact price. I paid $1375 all up for the work done to my manual box. To be honest, while I am happy with knowing that everything is nice and new in the box and I have warranty on it, if I knew it was going to cost that much I would have bought a complete second hand box and installed it myself.

Yeh cheaper auto spares have em pretty cheap i can get 2 synchro assemblies nd the input shaft for 500 so mite have to go for that, wouldn't mind a au box tho also america has some t5 basic rebuild kits for cheap