2lt trans options

[43SOM XB]

We've got a turbo (blow through) 2 lt built for our TD. I have a rebuilt manual gear box, and a C3 auto.
The wife and I would prefer sticking to the auto. driveability, will stay spooled up all the way through gears, plus we're old school.
But the manual might be more fun.

Is there any shift kits and aftermarket tourque converters for the C3s?
Or can another auto fit, like a C4 onto the same bell housing?

I searched high and low and found a kit in ameica for the C3, whether it's going to be right or not, thats the question.

any info?
cheers