Size? I can't tell you for sure at the moment. I picked it up for £10 from Brian at the Saab Sanctuary a few years back. Noticed it among his spares and bought it. It had a mount bracket missing so I made another. I wrote up a doc for a USA Saab guy and in that I say it's a 10" so I assume that's the actual size of the fan blades. I can send you the doc and some more pics if you want them. I'm sure I can find your email address if I search around a bit. Suppliers include http://www.cbsonline.co.uk/fans-206-c.asp http://www.s-v-c.co.uk/prod_fans.html Notes: The rad is offset so the fan should be aligned with the front panel. Not too high or it will foul the bonnet catch.
Woody,the fan I am using is from a Daewoo/Hyundai something or other,its a 9" and it fits in between the rad and front panel(65mm) and works well. I also have a fan from a Toyota Avensis which has better blades but is a bit wider(95mm) so the rad will have to be moved back a bit when the new rad is fitted. Both these fans cost £10 each from a breakers.
Also have a look at a Landrover or Range rover. You can fit 11-12" in there but it needs to be thin to fit infront of the rad, or you need to take the engine front cover off and cut the fan bearing mount off and blank it up.