i run the 944 spare wheels with extra holes drilled in them, one thing i have never been happy with is the rear axle nut showing
i run a 5/16 spacer on the rear wheel so sketched up a quick drawing and had a friend do the machine work for me.
these were cut out of a solid 7″ block of aluminum a couple more tweaks then i can polish them but i think they clean up the back a lot