tan...
If you get stuck I have a cosworth twin airbag control unit.
I know when I was looking for one about 5yrs ago the dealer struggled and got this in from germany. Anyway it wasn't what was wrong with my system so I still have it.
I know I am a long way away but if you get stuck you at least know where there is one.
I believe they are specific to twin airbag systems and cosworths.
good luck