Update
After some promising Craigslist leads 2hr away in Atlanta the Craigslist flakeout factor kicked in and none of the sellers materialized.
Possible find for $100 at a junkyard in Dalton 30 minutes away. They insist on bringing the old one in to confirm a match which actually seems like a reasonable idea.
Thanks for the leads in Manchester/Murphesboro that's "only" 1.5hr away.
It would be nice to go check out daw_two's stash but 6hr away is impractical if I can figure out something closer. That's pretty much adding 12hrs to the job.
Im due to leave town Monday so the carcass will have to sit till I get back.
If I could find one for $30 I'd be very happy.

The aluminum discussion is interesting. Are they painted or natural metal colored?

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84 300SD 274K
38K miles on flatplate heat exchanger and various diesel/veg blends. prior to that 4K miles on unheated veggie blends with kero and DinoD.