Crack in Bulkhead for a Saab 900 SE Convertible?

I recently went to get my Saab 900 SE convertible M plate diagnosed by a Saab dealer they told me that the bulkhead has a crack. Which is a MOT failure. To get a new part its £700 including service and VAT. Although the mechanic said this is a MOT failure but I’ve got till June till that runs out.

I also read somewhere that Saab are paying for Bulkheads (if found with cracks) to be replaced.
can someone recommend me a good mechanic or suggest what i should do.
Ben