I am looking for backing plates for 200mm chucks for my McMillan Lathe also goes by various other names such as Lantaine amd many others it's around 1980's vintage, it has a weird headstock spindle size 2 inch x 8TPI will have to double check with a set of wires one day. But I am pretty sure thats what it is. If anyone has one they no longer need or would like to make me a couple please PM.