Bosch yes
I don't do Transmissions any more now, except my own, modern trans are effectively un rebuildable these days, due to everything inside being made from wet noodles ............
When you rebuild 'em, you rely on most of the "Hard Parts" being in good condition, and just replace stuff that wears like Synchros Forks and Bearings etc, or Clutches, Seals, Filters, Bushes etc in an auto
But nowadays you build a box, give a guarantee, and a lot more % wise come back because some weak piece of shit that the stealerships won't sell separately has simply busted .................
Not worth it now, and it's only getting worse, I sold my share of the gearbox firm 14 years ago, my Partner sold up a couple years later, we had our hey day
John Mackie is your guy in Glesga, but fuck me, I sent a customer to him, Audi with a Reverse Gear issue when hot ..................... £3500 later .......................