I know it's not the 'correct' way to do it, but you can always drill out the jet itself to resize it. the same Industrial supply store I got the stuff to make my struts for my bike has the right size drill bits and the hand drill to use for them. they are in both metric and standard and go increments of .01mm and .001" respectively. start with the largest drill bit that will easily fit into the hole in the jet and buy the next 2 sizes up. try the smallest bit first. replace the jet into the carb, and test it out. if it works don't go up. if it's still to lean, then drill with the next size.
I had done some MAJOR mods on my bike when I had it, and I needed a bigger jet than what was available for my tomos. I didn't have a choice in the matter.
as for trying different styles of jets from another TYPE of carb. may work, may not. the end on the float bowl side is shaped the way it is for a reason. it has a lot to do with the way the carb atomizes the fuel.also , it may or may not be the proper depth in the fuel bowl to draw the fuel properly, making it run WAY RICH or WAY lean.
like I said drilling may not be the best solution, but could be the lesser of 2 evils.