Joseph – Hi, Mike Schreiner – the TEAE Florida Regional Rep – may know of someone who could do the work for you. I just picked up some parts from him, and he was showing me a spare transmission from a Mk IA he would like to sell if you need a transmission.
I had my existing transmission converted to wide ratio. Shipping to Franklin, NC was $120 .
Cost to Rebuild/Convert was $1200 which included return shipping in January 2022.
Turn around was about 3 weeks.
I have a shipping container if you need one.
I am in the process of a complete restoration on a rotisserie. so yes the engine is out of the car. I dont know that the transmission could be removed without pulling the engine perhaps someone could chime in. I would recommend you replacing those bits while you are at it.