I would consider starting off with a ball of Green Stuff that could then be shapped into looking as if it has pannels. From there, around the circumference, I would then insert one of the smaller Raider blades into each of the pannels and have it suspended upon one of the flying bases.
It looks like you might not have to wait long until you could purchase one from ebay, though.
http://www.thedarkcity.net/t5193-voidraven-in-february-white-dwarf