Hello Eric - ThickasaBrick
I to sent an email to Dave Barton looking for a harness for my 84' 760 D24T his reply to me...
"Hi Bobby,
I have no sources for diesels harnesses.
Dave"
If you find a source let me PLEASE let me know.
I did a search and came up with this, QUITE PRICEY THOUGH, and I haven't contacted them yet to see if they are still available and if they are updated - made with quality wire.
http://www.volvopartswarehouse.com/a.../GR-30931.html
Go to the site and search for what you're looking for, hope this helps.
Bobby J "Ironman"