I did not realize your situation was almost exactly as mine (I've read your thread previously, too), until you mentioning it now. Wow! Lucky no one was hurt in either case.

I see you've went the Sanden route. I may do the complete Klima kit that I've seen online, but I've had enough of dealing with major headaches in regards to my car for this year. I can get by without; have all summer to this point. That kit, plus a new condenser and aux fan would run around $950, parts only from Klima Design World. Vintage Air has complete heating/AC systems for a little more than that, but not much; might be a good idea to start with a brand new "climate control" system. Or, how about this for $466? Doesn't look to be a complete system, but I'll bet the total would be less than the $950 for the Klima/Sanden complete system overhaul.

Vintage Air Universal Gen II Super Cooler Heat Defrost Air Conditioning System | eBay


RE the 19mm bolts: I can check 'em, but I doubt they were an issue; everything looked in place and tight after the blowout.

EDIT: Upon further review, the Vintage Air idea looks awesome, but since they're selling the Sanden compressors for their kits, you'd be monkeying with that...PLUS installing the new Vintage Air kit. Plus side to the Vintage Air? Total bypass of all existing climate control (heat and air now controlled by new unit), plus adaptation into your existing ductwork---no vacuum control necessary.