Ok you guys gave me something to think about and I’ve come up with this. 3mm stainless bar as it’s all l had in the workshop. Bent to the dash profile and threaded the ends. Dremeled out a chanel half the thickness of the foam/rubber pad, to sink the threaded bar. I’ll do the same with the bigger pad another night as it’s getting late here in the UK.
Clever fix. The two ends being joined will keep it all from twisting as you tightened it all up.