Tom from Rostronics told us that their lights are modeled after Arri's. Makes me think that they'd be the same size. I'm not sure how it would mount though. Smelni, I'd suggest bringing a light or two into B+H with you to check out the sizes. Security may not be too pleased, but if you explain that they don't sell that brand of light and that you need to check a size they might let you in with it. I've wondered about this myself so if anyone has any better ideas, I'm all ears.
-Ryan