300 kit

[Paul C.]

I have to re-sleeve my barrel and I was thinking I may as well stick a 300 or 310 kit in the old girl. the problem is that the importers that use to bring them into Australia (serco) don't do them anymore, they were "wiseco big bore kits".
Can anyone point me in the right direction or hook me up?
Even if it's another brand...............Thanx.
:beer