differential fill plug

I have a new to me 99 Ranger XLT regular cab 4x4 that is in need of a new rear diff cover. I went to take the fill plug out before draining the old fluid and found it stripped and stuck. Instead of trying to get the plug out I’d prefer to just add a new cover with a fill plug in it. Has anyone...

This weekend upon trying to change my diff fluid in my 2000 ranger I started to strip my rear diff fill plug. 7.5" diff, I am wondering if anyone has the size/thread pitch or where I can get another one Thanks!