It's transpires that I need to develop another adapter kit for a type of Monster headlamp which I was not previously aware of.
I would like to buy, borrow or hire a complete headlamp with rim, glass and all the internal fasteners. The shell would be a bonus but not essential.
The type I seek is fitted to some of the S#R range and is identified by the plastic shell and two external screws in each side of the shell, below the mounting bolts, to hold the rim in place. The glass is held in the rim by three internal screws on tabs. with large square "nuts".
Also fitted to Sports classics I believe.
Cheers..