Mine still stays in place by itself. Just bugs me because I know the one tab is broke.My quest has been the same, and it has frustrated me to no end. The single tab is literally all that broke off. But I have found a solution of sorts. You mentioned having to buy the whole assembly above, and that’s unfortunately the case. But it’s $80 on eBay.
The part number is RL3T-14D068-CC.
I’ll be honest, I ain’t paying even $80 just for breaking a tab either, but I figured I’d comment here for anyone else looking. Maybe a zip tie around the fuse panel will be good enough for me. Zip ties fix everything.
Good luck man.