Hi All.
Iron Front 1944 is another source were the mod wizards might be able to grab some "Cockpits" to mod for SFK42.
Some of the vehicles availiable:
Panzerkampfwagen IV Ausf. H
Panzerkampfwagen V Panther Ausf. A
Panzerkampfwagen VI Tiger II Ausf. B
Sturmgeschütz III Ausf. G
T-34-76
T-34-85
JS-2
JS-122 '43
SU-85
Hope this helps.