Honestly, finding a mount for this isn’t going to be easy. It’s an older entry level tripod and they all had different plates; there was no real standard for a long time.
From the looks of it, this is a very cheap entry level tripod. You can tell because it has an all plastic head where the QR plate connects and because it has the braces that connect all 3 legs. You won’t find those features on any tripod worth using. As with most of these tripods, I doubt they even sold replacement plates when it was new.
You could go on amazon and buy a tripod of this quality style for under $50, so hunting for a plate that’s going to cost half of that doesn’t seem worthwhile to me.