I use the Stop&Go mushroom plugs.
They are smaller than the ones Tiger wheel and Tyre will fit, but for roadside repairs they are awesome.

It's a mushroom plug, but you fit them from the outside, so no need to take the tyre off.
I once plugged a car tyre for a lady, with them, and it lasted from Parys (Vrystaat) on a farm till she got home in Pta.
I plugged the tyre on my 1200S some time last year and I'm still running it. Will replace when I get a new tyre