(All I need now is the stretched 5 wing version to go with it!) 
Hi Paul,
The 5 winged V.8 was a crazy idea (though not the only one in this period...) that resulted in one of the ugliest aircraft ever.
You are probably aware of the existing resin kit of it by Anigrand. Although I'm always looking for the rare and different, I can't bring myself to actually buying one...
I would suggest the Siemens-Halske engined V.7 to go with your Triplane prototype.

Certainly true that it was a bit of a wacky idea and unsurprisingly was quickly shelved after test flying.
There are a few prototypes I wouldn't have even contemplated getting in the cockpit of and, like yourself, I'm not sure I could
actually bring myself to build one (even if a nice kit is available)

The Siemens =-Halske engined one looks similar, but different so maybe something I'll get around to at some point in the future since I've still got a couple of Dr1's on the shelf (It looks like it wouldn't have been much fun trying to land with that tall undercarriage, but the performance whilst in the air might have been worth it )
Cheers for now
Paul