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I’ve had no issues at Discount Tire over many wheels and tires.
 
Also, Right Away Tire is a mobile option that’ll come to you. Several friends have used them and been happy. 

Looks like its still on the car. You probably won't be able to get the leverage you need laying on your back under the car.
A really big pipe wrench to hold the drive shaft, a 3' pipe on your combination wrench (I cut the open end off one so I could slide a section of 3/4" water pipe over it), lots of swearing, and perhaps a helper is all it takes.
The penetrating oil and heat may help too. I left it soaking in penetrating oil overnight.
Looks like you marked the driveshaft already, so I assume you've read some of the threads/ articles on this topic already.
EDIT: Clarified which wrench the pipe goes on.

My intuition was correct. Went back to look for vacuum leaks and the intake manifold gaskets on cylinders 2 and 3 are leaking pretty bad. Sprayed them with starting fluid and nearly stalled the engine.
Those lower bolts look like a pain in the ass to get to. Not sure I can do all that just to put stock parts back on.
Well, off the road until I can get this fixed...

Okay, I think I can take 1/16" out of each side using the bushings.
When I get everything dialed as close as I can, I'll have a shop throw it on the rack and see if they can dial it in any better.
As an ounce of prevention, I'll mark everything so it's easy to spot if anything slips and I'll make it a routine part of my pre-drive checklist for a while.
Worst case, I'll pull the offset bushings, replace with urethane, and try different springs to bring ride height up a bit.
I'm using uncut, off the shelf BAV Auto springs. While they're supposed to be a tad lower than some other options, I didn't expect them to be such a hassle...

Thanks all!
Sounds pretty straight forward.