Looking for help trying to find 12 Spline Gears for my 1/4" Dual Shaft Stepper Motors

:wave:Hi there folks. I am in need of finding 12 spline gears that get pressed onto my
NEMA23 570oz/in 5A 1/4” Dual Shaft Stepper Motor (KL23H2100-50-4BM).

:confused: I have a bad motor and I know I should be able to pull the original gear off and press it onto the new motor but I would like to buy some new gears for the future just in case they are needed. Any insight would be great.
Thanks In Advance!:withstupi