I don't think they make repair kits anymore.
I do know that Kohler doesn't have repair kits for their fuel pumps.
I thought the fuel pump on my Sears Surburban with 18 horse power Onan was bad. Found out the gas cap wasn't vented, the vent hole was plugged up.
I blowed air in the fuel line from the pump back to the tank, now everything is good.