apart from hope who does em?

Straitline, Blackspire, Brave, Deity, Fire Eye, NC-17, Odi and probably some more as well.

n.b. hope make plugs, everyone else makes caps.

I actually went back to gold old fashioned plastic.
I stopped losing end plugs when i moved to lock on grips so i no longer felt an end plug that holds the grip in place was required.

Pedant.
Although the NC-17 ones are plugs as well.
Have at you sir!

x-lite used to dont know if they still do.

ta!