Grooved Slides to guide Modules or Cards in customisable rackmount nest enclosures

2nd try, on a different newsgroup Looking for more of these - rather difficult to describe in brief - make unknown, maybe Vero. These sturdy, moulded guide ribs are made from black nylon/PTFE, fully grooved 2mm wide & deep, with an optional, embedded, square 4BA or M4 nut at front - for securing a threaded puller. The groove funnels out and recedes at its front . Toward each end is a 3mm slit stud in a well, obverse to the rib groove, which locate and engage, where needed, in the exposed perforations of steel inserts trapped in the front and rear (different) extruded ali profiles across the nest, this pair is set 187mm apart. The slide grooves accept the raised longitudinal "fins" of modules that glide in - two fins above, two fins below - or the same grooved "guides" can be used just for keeping full-height cards in place. Length of each runner/guide 252mm Width along 187mm body nearly 6mm, over ali extrusions 9mm Height 9mm Distance between locating studs 213mm Does anybody know where can I get another 24 of these, please? Thanx in advance. Jim