Hi Cats... dont know if this will completely break your spirit or not... I have a "1985 toyota hilux 2.4D" (just listen

) that I had to have rebuild in south america in Paraguay (look it up if you have to)... all four piston, diesel pump, etc. etc.... the workshop's most advance equipment was the stereo blasting in the background. I am not blowing Toyota's horn... the point is older builds without turbo's we're easier to rebuild than newer engines.
My baby.. 1998 LWB GLS 2.8 non-turbo... almost 275.000.kms - up till now luckily hasnt had anything big (touch wood)... As far as I heard here (South America), you cant win against a rebuild on a turbo. It just keeps piling up... like in your case...
I dont have any advice either... since I know/understand the ( if I dare say ) "bond" you have with Snoopy... But as Disney showed us... All dogs go to heaven (eventually)...
Good luck, and please keep us updated, since a lot of us "high-mileage clubbers" are going to go through the same in a couple of years.
Regards