There seems to be three "sets" of CIM.
2002-2004 Several versions All replaced by the 2004 model.
2005-2010 All previous versions replaced by the 2009/10 model.
2011 model.
Then another lot labelled with "ESP"
If your car is a 2007 model you would have one of three CIMs.
This one with no ESP (unlikely that you have this):
Article : Electric Module
PartNo : 12769671
Usage : 2007, AU, EU, GB, LA, 433, 92 MHZ, NLS-USE 12842076
Order Quantity : 1
Or one of these, for cars with ESP, depending on chassis number:
Article : Electric Module
PartNo : 12769673
Usage : 2007, 433, 92 MHZ ESP, NLS-USE 12842078
Order Quantity : 1
Article : Electric Module
PartNo : 12777263
Usage : 2007, 433, 92 MHZ ESP, NLS-USE 12842078
Order Quantity : 1
So, if you get a new one, you will need either 12842076 (no ESP) or 12842078 (with ESP)
You probably need 12842078 which has a Saab list price of £285.76 + VAT = £343. To which you add the fitting.
If you know someone experienced with a Tech2, you could buy a CIM for a bit less and fit it yourself + the Tech2 session. But the car would not be drivable during the fitting process, so all the work needs to be done in one place.
But I would still investigate a repair by one of the companies linked to earlier. You would (should) get it back ready to refit with no Tech2 needed.