Saab: I need a Saab Momo steering wheel adapter for a 9000

Hi,
I've come across a 3-spoke Saab Momo steering wheel that was originally on a 900. Does anyone know where I can get a hub adapter for my non-airbag '89 9000? I know they exist because I've seen the same wheel as an option in an old 9000 brochure and it was also stock on a 1988 9000 SPG (a Canadian market special model).

TIA,
Rod.

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