Hi fvfdrums,

When I made my machine a few years ago I bought profile rails from this place on ebay. For example:
http://www.ebay.co.uk/itm/THK-SSR20-...item4165411fab

They are second hand parts, so you take a chance, but I ordered a pair at 700mm (Y) and a pair at 300mm (Z). 700mm was about £140 for pair of rails and 4 blocks, and 300mm was around £80 for pair of rails and 4 blocks. Vaguely remember paying import tax on one of these orders. They had a very smooth action and work very well on my machine although I only really cut plywood, liteply, and balsa.