I keep running into this same problem of finding a good shaft support/heim joint for the steering shaft to pass through when using 3 joints. All of the shaft supports for steering are for 3/4" (DD), but the steering shaft that works for my set-up is 1"DD where I can put the support. I guess the big issue is I want to use a telescoping/collapsible shaft (both for ease of install and for some safety measure), which uses 3/4DD that slides inside of the 1DD. Due to the diameter/spline count required for the gear input, I have to run the 3/4DD to that joint. That leaves the upper end of the shaft at 1DD....but I am not finding a reasonable 1" support for 1DD shaft anywhere.
I did order a 1" heim, but its massive in size as its build for heavy-ish equipment usage, plus the spherical swivel ball/heim seems to require undue leverage to get it to move. I actually think the hollow DD steering shaft would be at risk of bending before the heim swiveled when things flexed - maybe I am missing a way to 'unlock' the heim? Here's a pic of the two:
For all of the 1" DD shafts and ujoints sold for steering, seems there should be a matching 1" shaft support? I ran into this issue on the 58 as well, but so far I have avoided using a support by using only 2 joints, and basically getting lucky that the upper joint, while maxed out with the angle of operation, so far doesn't bind in mostly on-road usage.