Zippy is one of the companies that has supplied Happ since they left Cherry.  These 50g maximum operating force microswitches are the exact ones you will find others selling for a lot more.  For comparison, Cherry switches are a maximum force of 75g so you will get that classic feel with these switches.

We put our numbers out there, front and center, NO FUZZY MATH!  This way you can compare and understand the different forces seen with microswtiches.  Most Chinese standard buttons will use 125g which are just too hard for good play, look for people who report the weights to help you buy the right micro for your machine.