i am looking for a oil relief check valve where can i find one on 1994 Infiniti J30

I was changing the oil on my 94 Infiniti j30 when I took the oil filter off a ball bearing dropped out of the engine I looked and it came from the oil pressure relief valve and the cap that keeps the ball in place is cracked where can I get a new one fast. This is my only transportation

Asked by for the 1994 Infiniti J30
uncommon part and fast will not work. you need to go to the dealer parts area and see if they stock it. order it overnight if they do not stock it.