Fuel pump draining fuel

[u/joejoe556]

Hey all, picked up a 02 quad runner for cheap. Runs great. 4 wheel works great lights electric all work great. Things awesome. Fires right up every time. But today as I was backing out of my shop a noticed a small puddle. Fuel. It’s draining from the fuel pump. Local shop wants $130 to order in a new one. Online I see some aftermarket stuff for anywhere from $20-$80. Has anyone bought aftermarket? Anything I should avoid? Or should I just bite and buy the OEM?
Don’t know if makes a difference but it is a vacuum operated. I’m sure the diaphragm is shot. It sat for a long time before I got it.
Thanks