IWM Pinout

Hi all. I fried my IWM in a IIgs. I have only been able to locate a DIP IWM, not the package used in the IIgs. I was wondering if anyone knows either:

- If they are electrically identical (DIP & non-DIP (CLCC?)) and if so, what are the pinout differences?

OR

- Is someone aware of a source for the (CLCC?) package layout IWM chips used in the IIgs?

Thank you!
Greg