As it happens I would have bought one from them so I will now try and get one made by my mate Daz the tame machinist
He is gonna sort out a few of the Sato style street hooks first over the next few weeks, then MY chain guard and if that works out I'll pop up on here to see if I can stir up some business for them. The only issue with getting stuff anodised is there is only one guy locally who does it and it's expensive so he can only get stuff done when his company puts stuff through. That can be anything from days to months between gigs. The other issue is he is doing this work in his own time.
If anyone wants to forward me the dimensions for the chain guards (Rizoma or Colin BR) I'd be most appreciative.