The obvious thing to do was therefore make my own out of aluminium.

Just after starting to beat out the mudguard section it occurred to me that it would be virtually impossible to do it nicely without an English wheel. I didn't have an English wheel so I delayed the project while I knocked up this:

Made from tube left over from a previous car project, two old clutch release bearings pressed into a bit of stainless tube, and an old iron caster wheel.
It works well enough:

The chainguard was the first thing I made. This needs a bit of fettling as it was copied from the dimensions of the hugger which bears no relation to the run of the chain!

You can see the 'mod' line in marker pen.
These are the two sides which will join everything together. They also need some shaping:

Hopefully will have it largely finished this week. Will keep you posted!