Oil leaking around oil pressure sensor

So bought this vehicle listed above, and was given a new OPS and told that's what was causing check engine light but they didn't have time to replace. I went to replace it,and find out that whomever, had cracked the oil filter bracket by over tightening I ripped front of engine off and removed bracket, it is next to impossible to find them anymore. so welded the crack and put back in, weld is beautiful, but I believe there is a spiral leak from thread damaged when crack was made. Need a fix to seal it, at this point I don't care if fix means it can never be removed again. Just need my car back on the road.. Thank you.