Enzotech VGA-IB on Radeon HD 4770

So I'm going to be getting a Radeon HD 4770 pretty soon, so I figured I'd take a look at the Enzotech VGA-IB (Enzotech has served me well in the past, and the block matches my current CPU block and NB block). So I was wondering if anyone knew if it will fit the HD 4770. It doesn't say it will, but it does say that it will fit a "Radeon 4850" and a "Radeon HD 3850". I don't know of a Radeon 4850 without an HD in front (I also don't know the name of every ATI card in the world) and usually if a block fits on a card of the same same series (HD 4k) it will fit all or most of them. So I just wanted to check and make sure that...

a) There is no plain old Radeon 4850 that I'm unaware of
b) A block for an HD 4850 (Specifically the Enzotech VGA-IB) will fit onto an HD 4770

thanks guys!