Weldtite tubeless tyre plugs

[Silver940]

I use the Weldtite kit for tubeless repairs, has worked a treat but used the last 2 strings yesterday. I have bought some plugs from ebay but they are car/motor bike ones so have had to slice them lengthways so they'll fit the insertion tool. Have yet to find anywhere that sells just the replacement plugs. Anyone found them?

Cheers