Ah, that's a shame.
Most manual R33/34 gearboxes I've seen go for 1K+, add labor on that (Don't have the right tools to do it myself) and it ends up being 3K+, would be easier to sell/trade this car off.
For what it's worth the R34 is pretty roomy for what it is, definitely loads more room then the Supra (Managed to fit all my luggage when I went to Sydney + a mates).