DIY Air Filtration Unit Question

So, I’m often a DIY type of guy when it comes to building things like shop cabinets, jigs, etc. I’m wanting to install a ceiling mounted air filtration unit in my small shop, but am contemplating building my own instead of buying the usual Jet, Powermatic, JDS, etc. offerings. Nothing wrong with those guys, I just kinda like to customize stuff and do it on the cheap if I can. I’ve got my design down and think I’ve got a good source for a squirrel cage fan/motor.

The question I’m curious about is this: do any of you know how/where to acquire the remote control components to install an integral switch like the commercial units have that allow you to change motor speeds, set a timer, etc. I’m sure most of the commercial companies get their controls from a similar source since they all pretty much look/function similarly.

I realize there are plenty of creative alternate work arounds: wall mounted timer switches, a rheostat for speed control, etc. I’d just like to keep it all contained in the unit itself if possible – so that it’s pretty much just like the commercial units. I’m guessing there’s some electrical supply place that would sell these I just don’t know exactly where to start or even what to call it “officially.”

Any thoughts/ideas would be most welcome! Thanks!!!