Mk1 Gti Gearbox needed

Hi Guys

I've damaged the 2nd gear cog on the gearbox of my otherwise minted Cabby. I'm looking for a replacement gearbox to either replace the current one or strip for the required parts. Does anyone have or know of one that's available?

Thanks

why, when, what, how do you know you have damaged 2nd gear cog?

The garage sent a video showing the cogs with box out of the car.  

ah, was wondering if it was just the usual recalcitrant syncro on 2nd that afflicts most 020 boxes