[digiartist]

Thanks for that tip! I had actually reached out to Ken McCoy who runs the 352nd fg website, he then put me in touch with a couple of historians. The upshot being that they too felt it was most probably Jg-53 2nd Gruppe that Preddy ran into.
So as that ties into what John came up with, I think that's the unit I'll depict.
Thanks to everyone for their very helpful replies.

Cheers

Gareth