Well the best I have found is maxmia MTL (Stands for manual transmission lube).
They make it in 3 weights, 75 which is lite, 80 which is regular, and 85 which is heavy. I'd run the 80wt regular (MTL-R).
Now if maxmia is to expensive run a good quality type-f tranny fluid.
What ever you run, change it often, every 10 to 15 hours to keep all the particles cleaned out of the motor.
If you shop for the maximum on amazon it's only about $1 to $2 a qt difference from a good quality type F fluid.