Finally got aggravated enough with my home brew twin stick I'd made when I first built this rig. I'd used two stock shifters and cut the ball section in half. It worked pretty well, but sealing it up was never very good. I went back to looking around at what some others have done for this because in true Samurai spirit I refuse to pay for something I can make myself.
The best option I've seen is one that supazuk94 put together. I wasn't able to come up with the needle bearings like he used, but I believe the bronze bearing will work pretty well in this application. Pretty straight forward setup...just a lot of put it together, take it apart to get it right. I picked up the 1/2" rod and a 12mm 1.25 bolt to use for the shift knobs so I'm hoping to finish this up tonight.
Parts:
bronze bearing 1/2" OD, 3/8" ID - $2.40
steel sleeve 1/2" ID - $1.80
1/4" plate - shift arms - FREE SCRAP
1.25" x .125" wall square tube - $5 1 ft section
3/8" steel rod - drilled thru and tapped 8-32 - $5 3ft section
1/2" steel rod - shift handles - $5.50 3ft section
12mm x 1.25 bolt - to attach knobs - $1.10
Total - $20.80 and a pile of extra material left over