A quick learner from WA says:
do you make these P-TYPE PLUNGER ASSEMBLY FOR 1" frame so instead of 5/8 we need 3/4" with 1/2" length pin
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Casey from SWISCO responded:

Hello, thank you for writing in. I'm afraid 70-171 is our only P-Type Plunger, but is designed for a 5/8" frame. I apologize for the inconvenience. 

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