Thanks heaps OceanAddicts for sending me the sets of foil mounting nuts & bolts. Much appreciated.
Didn't realise such a simple item was difficult to find.
I also stumbled across an engineering company called Oceania Industrial Components that would have supplied me the stainless steel m8 T Nuts also. The nuts look as if they may fit also. Around $12.50 each.
The company sells numerous products. That you may not find elsewhere. If you are interested take a look.
Cheers