Facts...I doubt it. The two connections attached to the housing in question, are the fuel canister returns, replete with a venturi. Those are considered pollution-related, and have to be EPA approved. I suspect you could build one, but you'd have to duplicate the venturi setup, or you'd get a bunch of P0440 codes.
Lol, @Apples, I was agreeing with your statement as factual. Esp the part about throwing codes. My apologies...Facts?
Anything pollution-related, falls under the auspices of the EPA. This includes the evaporative fuel recovery system. Defeat or modify this and similar pollution devices, and you're technically violating fed law.
Whether you consider this a fact or not, is moot.