There is a section in Verlinden Publication's "Modeling WWII Aircraft" Vol 1 featuring a HE 219 in a diorama. I know this is no answer to your question but I believe you'd benefit from the book. It's basically an add for Verlinden but the models are insane! Especially the UHU, darn thing looks like it could take off! I look at them sometimes just to get inspired when I develop "modelers block"
I've looked at them a lot lately.
-fish