toolpost grinder

I picked this up recently. What model is this? I see lots of "model 5" and "model 11", and "model 44", but never "5029A" as listed on the tag. Looks as if the shaft may be replaceable with differing lengths? I need a belt. I measured and it looks to be a 20.5" length. I see someone else...

I posted this to show that this toolpost grinder will work on this lathe. Here are some photos of the Dumore tool post grinder mounted on the grizzly 4000 3G lathe. It was necessary to machine the grinder mount post .078 to reduce the grinder spindle centerline height to match the lathe...