Rails for K40 laser cutter/engraver

NOt sure what category this would fit in…but I’m looking for new high performance rails to rebuild the x-y axes of my K40 (Chinese) laser engraver. So far the K40 is working okay but the gantry is riding on plastic wheels - not good for wear. I’d like to get a nice machined set of rails but cannot find them in Google land. Videos purport to indicate they are available, but never details or vendor. I don’t really want to redesign from scratch…prefer more to screw the parts together.
Any one know of a vendor?

Can any aluminum extrusion be used? Normally the profile needs to match your application. For example these are pretty robust, but are a slot system:

The good part is that there are accessories to help you connect one to the next.