May be able to find a replacement OEM on EBAY if the original is faulty. Not sure if the original question was for informational purposes or there is...
I'd try the brass bushing (check to see if the old bushing has failed). If it is gone you probably can't go over 25-30 mph or so. Problem is probably...
Sounds like a plan although 20/32 psi is somewhat low. Still, if you are getting good temps I'd leave it be and simply keep an eye on it. Congrats on...