I contacted that guy. he got back to me very promptly. The message was very informative as it referenced his email conversation with a UK Saab dealer that has the kit. I will quote that part for anyone else that is interested now or in the future. If you want the whole thing, email me.

Craig also said that his dealer in the US has this part number. And, although it is meant for Saab 900, it should work in 9-3's.

In reply to:

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Turner's Hill Saab wrote:

Dear Ben,

I have attached a parts picture of the 900 dash front, I think the part you
need is number 32 storage pocket 4616660, if you are fitting a standard DIN
size radio (NOT FACTORY TYPE RADIO) you will also need mounting kit
400101796.

We keep both parts in stock, 4616660 price ?5.44 and 400101796 ?4.94, if
you would like to order please go to our shop site and use additional
products under the parts department page and key in the part numbers etc in
the additional info box.

If these are not what you want please get back to me.

Regards,

Mark Wells.
Parts Department.

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Turner's Hill Saab website