Well the original venom was a harlequin vehicle, and it was achieved with an old raider kit-bashed with a vyper jetbike. I can't find a picture of it at the moment but it may fit your needs. It basically looks like a flying sickle.
It's in the eldar collector's guide, under an article "making the venom" by Gareth Richards. I can't seem to find it online and there is a comedian or something with that name which spoils most of my searches.
Subject: Venom Conversion 
Sun Nov 29 2015, 02:13
