[frizzen]

My thought was make something that looks kind of like a toilet plunger, with an RTV silicone cup molded to the hub cap. Hopefully it would act kind of like a jar lid opener, and grip the hub to install/remove while you rotate the handle.

The holes around the edge to use a wrench like a pin-spanner would probably be faster to mod. I thought you ment center drill and file or broach flats in the hole to fit an allen wrench.