I've got an unused Pompetamine fork that I bought for a project in the distant past, it meets most of your criteria as its disc only, steel and was built to match the Pompino geometry - £35 if you want it.
It is white, but a can of spray paint should solve that.
I've got an unused Pompetamine fork that I bought for a project in the distant past, it meets most of your criteria as its disc only, steel and was built to match the Pompino geometry - £35 if you want it.
It is white, but a can of spray paint should solve that.