Wow they claimed all your new parts were worn out LOL, sounds like they were really trying to serve you with an outrageous repair and alignment bill.
I had Les Schwab do the alignment on my B2 a couple months ago and they found a few items that needed replaced, the alignment guy actually had me get down in the pit so he could show me what was worn out and needed replaced, pointed out all the stuff he was going to do to align the truck, great guy, and extremely knowledgeable. I had called and talked to him on the phone and explained what was going on with the camber and he said he didn't think it needed new bushings just weren't installed correctly he was right previous owner just never had the camber adjusted and hadn't had it aligned after they screwed with it. Its almost dead on now, and the truck is 30 years old.
A lot of these shops now the people that work there are young guys that have never seen these TTB axles, and have no clue what they're doing. Plus many are lazy and just don't want to do the work but they sure want to bill you for nonsense parts.