Frac mounting rails query

[deepblackjoe@gmail.com]

Hello people - got a question for ya. You know those u-shaped channel rails for mounting modules in a 19" rack, that you attach flat rack ears to the ends? Does anyone know where to find these? Someone gave me a few with some taken-apart Paia enclosures, but I need some more for two four-panel cases. I guess I could try to find some of the stock material and try to drill and tap all the holes in a precise way, but was hoping to find them. I've made some of the flat rack ears out of aluminum. I asked Paia, but they only sell the complete enclosures and don't want to part them out, which is understandable. Any ideas would be appreciated, my frac setup is undergoing a real growth spurt

[fracmonkey]

Blacet makes these but they come in a two tier bare rak. You would need two of these to get a four tier rak.