Shoebox 4500, I refused to let it go! Need some assistance from F10 owners.

I have a Shoebox 4500, from my paintball days. Even with it quirks I still love this thing. I’m currently in search of the part number for the electronic Pressure switch. To retro fit unto my box. The original cutoff spring broke and is no where to be found. Can you F10 owners please provide the make and part number from you shoebox? I found a list online that states its a GEMS unit but I’m not sure if it’s accurate and did not provide part numbers. Thanks
 
My F8 has a United Electric Controls 10-B15. Mine doesn't work anymore, I just keep and eye on it and shut it off manually.
I never ordered one as both the PDF and the Lesman description say it has a 1/4" npt fitting. MIne is 1/8"npt.


New -

Here is a used one -
 
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I have these numbers from the cut-off switch and hope that it helps!
GEMS, PS71
ADJ 2500/5000 (Assume PSI)
Number One: 243789 (SKU #?)
Number Two: 2.4714 (Not certain about the 2.4, the decimal point is faint, but there)
Not sure why there are 2 numbers, but that is what it shows. I can send you a pic if you want.
mike