As my ole autobody instructor used to say: "We can build you a new car around your old left door handle, given enough money and time". I believe someone may be in the midst of doing just this.
Haven't heard any updates for some time.
Please conduct a search. This question "raises its ugly head" frequently.
Speaking as someone with 8 yrs experience in autobody and ASE certified, I would not recommend this procedure. It will be less expensive to find and refurbish a worn out 6-Spd. The vehicle is not rare. With patience, you can find one and if its color is not to you liking, spend the money to have the car gutted and repainted.