Northern Colorado Driveline out of Greeley. If you are near Boulder there is Drive Line Service of Boulder. I'm in Fort Collins and there is nothing in town here. I have had both those guys do work for me and they both know their stuff and usually have one day turnaround or better.
The Greeley place was able to keep my Toyota CV in place, and the boulder dude seemed to think he needed to build a whole new driveshaft with a Spicer CV which was going to cost $200 more. Glad I called Greeley... I have yet to wheel it but the driveshaft does look great and the spline section looks super burly. Of course there's a 1310 on it now so I suppose it is weaker compared to what I took off. If I blow that joint up a couple of times I will pick up the Allpro unit most likely.
EDIT: I didn't get more info but it's possible the boulder joint was going to build a driveshaft with 1350s. He did note that we was worried about operating angle with the CV joint and iirc that is an issue with 1350s (?)