Trapezoidal lead screws

Hi All.
Where to buy good enough quality trapezoidal metric lead screws for foam cutter? We have made foam cutter and everything looks fine except Y axis lead screws, they are whipping (when rotating moving from side to side) and we get wavy cut.

Thanks

Hi,
You could try Jena Tec, they have several European bases.
They list trapezoidals in a range of sizes and qualities.
I've never bought from them, so no price info.
John.