Given they are two completely different engines, coded in totally different languages, I'd say no. What you could probably do is take the original model they made (before exporting it to IL-2) and add some more detail.

Given the more detailed models being used in CloD and the more detailed damage modeling, I'd say starting from scratch would be best.

Also I'm a little more worried about additional aircraft being modeled instead of other vehicles that are pretty much useless at this time. How many tanks and trucks did they make, for a battle completely devoid of ground combat. It's not like the Luftwaffe and RAF were doing many tank-busting missions in 1940.