McClelland bulk 2010 would be a good base for a VaPer concoction. So would Mac Baren Virginia #1. Both bulks.
But really, with a plethora (I love being able to use that word!) of great, distinctive VaPers available, why bother?
Want a nice VaPer crumble kake? Try
C&D's Kajun Kake,
H&H Anni Kake, or even
Capt. Earl's Honor Blend (adorned with whispers of Oriental and Cavendish). And I think you'll have a hard time trying to improve on
C&D's Chenet's Cake. But good luck! Part of the joy of a hobby is experimentation. I understand that. Just remember to take good notes so you can reproduce you successes, and avoid repeating failures.
I think Esoterica's Peacehaven and Brighton are two ribbon cuts that go very well with blending Perique.
I've mixed them that way with some success; but never in a crumble cake -- which could be interesting.
Oh! It just came to mind:
John Patton's Quadruple Virginia. It's really
Cool Hand Fluke without the 40% Perique, so for sure it's Perique-friendly. Since it's slightly sweet it would probably be nice in a crumble cake -- and, it's a bulk.