Good Morning watchingskyfallatm and welcome to the forum,
Since you are from down under, the importer/distributor JR Kennedy also does Sigma, so in OZ, they tend to package Pentax bodies with Sigma lenses. This is not bad - as Sigma has some excellent lenses. Its just that Sigma lenses are not sealed. On the Pentax lens you need to look for the
WR after the name, and it is always on the lens, usually around the front element and in
Blue
You can call Ted's camera and ask them if they have a K30 or K50 bundled with a WR lens - either the 18-55WR or 18-135WR. I skimmed through their Pentax offerings and did not see any.
You also need to be a bit careful. Pentax has another body the K500 which is the same as the K50, but with out the weather sealing and a couple of other features.