There's a Set neck 5 string custom with what appear to be with Orion features on eBay
 
The C means custom. I am assuming that it's set neck solely from the pix.
 
I think the seller might need to adjust his expectations on price - he's near the used Series zone.
 
I have no affiliation with the bass or seller, just obsessively scouring eBay for my next Alembic...

Looks like an Orion with a Spoiler body.

I asked the seller what it weighed: The weight of the bass by itself is 11 pounds and 5 ounces.