Good to see some more lathe conversions. I am working on a Hardinge TFB conversion. Just in the planning/component acquisition stage at the moment. MPG's are hard to find, I got two from
http://www.rogersmachine.net/MPG/heatsink.html
Not cheap but very nice quality. If you are lucky you might be able to get some form eBay. However, I never found any when I was looking.