Reddit reviews 8mm Shaft 330mm=12.992 Hardened Rod Linear Motion
We found 1 Reddit comments about 8mm Shaft 330mm=12.992 Hardened Rod Linear Motion. Here are the top ones, ranked by their Reddit score.
Round steel shaft for use with linear support blocks and closed type slide units in linear motion applicationsChrome plated for corrosion resistanceCase hardened for wear resistancePrecision ground for consistent ball bushing radial clearanceShaft diameter and length specified for accurate fit
When in the same predicament as you, I went ahead and just made my own new bed:
https://www.dropbox.com/s/e9mnlufak09vdc9/Bed_Frame_-_Left.stl
https://www.dropbox.com/s/e9mnlufak09vdc9/Bed_Frame_-_Left.stl
https://www.midweststeelsupply.com/store/castaluminumplate
(1/4" x 13.25" x 6.5")
https://www.amazon.com/gp/product/B0045DUX5A
All told, that's ~$50 for pretty much exactly the same thing. All you need to be able to do is drill holes in the corners of the plate.