Press fit jets

Hello everyone, I'm currently rebuilding a 1975 cb550k and have stumbled into an issue. I do not have the stock air box and I'm using a four into one exhaust so I'll need to jet up. However, the main Jets for my model are press ins and I cannot find press ins in a variety for a reasonable price. Does anyone have experience with tapping the holes and putting screw in jets instead? I would try to 3D print them and drill them out, but I worry that the plastic will be affected by the fuel.

Any help would be great, thanks 👍