Hi. Long time lurker, finally posting as I’ve hit my head against a wall trying to find a certain potentiometer

I’m hoping someone in this very knowledgeable forum could help point me in the right direction.
I have a subwoofer that has a wonky pot. I’m handy enough with a soldering iron etc to get this replaced but for the life of me, I cannot seem to find a replacement pot. The specs are simple enough, A10K,16mm but the current pot seems to have a collar around it and I can’t find anything even remotely similar to this. I’ve attached pics for clarity.
I’ve tried the usual, RS, Mouser, element 14 but I’m just an idiot.

That’s the “level” pot and finding a replacement for that has been impossible. I’d also like to change the pot beside it which controls the LPF and that’s B50K, same size but it has 6 pins (making it 2 gang I believe) and again with that collar.
I’ve searched and searched but am coming up empty. I even figured I’d just get a simple standard pot and forgo the collar but even that hasn’t worked out; can’t seem to find the right sized pot.
I can’t believe a simple pot like this can be so difficult to find, so I’ve pretty much confirmed, yes I am an idiot.

Any pointers please? Really appreciate any assistance.
Thank you!!