I have a 722.112 out of a 79' 280ce with only 121k miles on it, and a 722.303 out of an 81 300TD with only 82k miles on it. I don't know if these will work for you, but its only $295 each and I am in NY, so not too far from you and I can ship if needed.

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Von
Fairport, NY
1973 Unimog 416 Doka
1980 Unimog 416 Doka
1981 Unimog 416 Doka
1984 Euro 280CE w/diesel conversion
1985 300TD Estate wagon
(I really need to stop buying these things!)
http://vonsmog.com