If you can't get one from Harisuluv, I have one...but I'm not willing to give up my only spare yet. So...I'm trying to make one, just for "s#^7s" and giggles, I think it would be a good challenge! stay tuned, here is my progress so far.
As a side note, I clean them by putting an appropriate sized wire into an Xacto knife handle and using it to reach into the carb body to clean them without removal. It takes awhile to succeed, but I've been successful many times.
For those who realize the difficulty in making one of these, yes it has to be sized just right to be a press fit. I may have to make a holder to put it in straight because of the "press-fit" requirement and if it goes in too loose, throw it away, the risk isn't worth it. the actual orifice size will be off a little, but a smidge more gas from the accel pump shouldn't be that big a problem should it? If I figure out a way to measure the flow rate I can pinch the tube at the orifice for lesser volume.
just for fun...
kb