Dieter did one other smart thing: when he set up the Eurorack modular standard, he based it on an existing industrial standard for EE modules. That way, Eurorack could take advantage of a sizable installed base that already existed when speccing parts and specs for Eurorack. You actually can get Eurorack enclosures that are made by industrial equipment firms (Knurr's Elicon system comes to mind here) that have some different designs that make for very nice fixed-installation Eurorack cabs.
The sole downside of this supply avenue, however, is that these firms do not "speak music". They're used to dealing with large industrial/technical concerns and in institutional-sized orders, so trying to source some of these...or even get a price for components...is a royal PITA. I attempted some time back to contact the US distributor for Knurr, for example, and they couldn't wrap their heads around the application I intended. Similarly, workstation furniture manufacturers such as Winstead also have this same "issue" of user scale, where if you want just one or two things, you're not worth their time...or at least, you're made to feel that way. Thankfully, the subcomponents such as rails, etc are easily gotten from distributors such as Mouser or Allied in quantities that work for this user base...but it would be SO snazzy to be able to get a full-tilt Elicon rig if that were a suitable possibility.