Email Mark at Lancing Marine in the UK: http://www.lancingmarine.com/
(Turbo and possibly inter-cooler)
Sally from Logan Diesel:
TA Diesel: https://www.tadiesels.com
Advanced Marine: 949-548-9791
Do not toss your old inter-cooler!!!
The end caps will be needed to be soldered on the new tube stack.
All that said, Brian has a pretty good pulse on what to do as work arounds.
The things that I actually found difficult are pistons and exact rods for my sp275. I lucked out on getting the last piston Brian had (after calling everyone too). Had to settle for a rod 0.006” longer for the offending cylinder—lots of measuring to ensure I don’t blow the head and throw the engine out of balance. Mind you, I was fixing just the one and reusing the others. I could have gotten a whole set of the next grade down from Bomac. I think the sp135 takes such.