Dimes and spring in isx oil pump regulator

[cawakening]

There's some old threads but I'm wondering if anyone knows a source for the spring in the regulator. I'm tempted to try the dimes trick and here's my reason. I can run 5000ish miles before my oil pressure drops to 20 psi then turns the motor off. I've got no leaks, and I don't burn oil. 839510 miles. I've seen on another forum a guy going through the issue I have and he replaced his pump and it didn't help increase his oil pressure. The pumps are remanned and maybe not every pump gets a new spring so my thinking is try a new spring and maybe 8-10 dimes. Has anyone gone thru this and tried the dimes spacer trick? For that matter does anyone here offer a proper spacer so dimes don't need to be used? I'm still making payments on this truck and I can't keep doing oil changes every 5000 miles I'd really appreciate some insight and help.