My frankenbike is missing the LH switch for horn/lights and the one I bought on ebay fell apart. So as i try an restore this 72 DT2 back to road worthy was wondering if anyone has used an aftermarket switch like the one from 2Fastmoto?

You could maybe address the problem from a different angle.

Many, many Yamahas of that era used the same basic housing, which is stamped on the underside YHA205, albeit with different wire and switch combinations. Search fleabay, craigslist etc for all Yamaha left switches, using a wide array of search words and also the number 83972 (the section of all Yamaha part numbers for left switchgear, or I think Switch 4, as it's referred to). You might be able to find enough good parts from a couple of broken switches to make a good one pretty cheap.

Vintage Connections sell the correct connectors and DEET here on the forum sells some lovely replacement silver/grey wire sheathing (This email address is being protected from spambots. You need JavaScript enabled to view it.).

There should be plenty of pictures on the internet of what the correct switchgear looks like, but come back if you have any queries.

Of course, after all my rabbiting, someone will probably pop up and say that they have one!