From: east coast, usa
Like others I have been following unit histories and here are a few for consideration:
328 Inf (39corps, 2pzG), arrives t80, 7-4-42, but historically arrived with 9th Army 4-42. It went to France 11 or 12-42, returned 6 or 9-43 (which is after the scenario ends).
5 Inf (5corps, 3pzG) was in the central sector with 5 corps, 9th Army until 11-41 when it was sent to France to refit as 5 leichte. Returned to 10 corp, 16 Army, 2-42, redesignated 5 jager 7-42, stayed in the Staraya Russa sector until 1944. In the scenario 5 Inf never leaves and 5 jager (55corp, 2pzG) arrives t80.
8 Inf (8corps, AOK9) part of 8 corp, 9th Army until 11 or 12-41 when it was sent to France to refit as 8 leichte, returned 3-42 and sent to 10 corp, 16 Army, redesignated 8 jager 6-42. In the scenario 8 Inf never leaves and 8 jager (59corps, AOK4) arrives t78 or 79.
For both the 5th and 8th, the 'leichte' to 'jager' change appears to have been in name only, so maybe the original Infantry units can withdraw and the Jager versions can arrive later.