Theres luckily many options
(and welcome to Bloomilk)
JediCartographer might make a few/mapmaker,
the trades forums here on Bloomilk, AST, Lead-Adventure.DE and Heroclix Realms can provide quick and easy access to some maps,
alternately, Amazon and Gumtree/Ebay have some good deals from time to time on the starter sets, which contains maps.
There's also TrollandToad, miniaturesmarket, GameHollow, and some online stores which can have just the maps themselves at some nice prices.
If you're looking for specific maps, it'd be great to see a wants list so as people can see if they have what you're looking for
and at the moment,
people are running a map-designer thread,
so as you can make a tournament grade- printable map for at home (which you could then get laminated or printed at OfficeWorks etc)
so there's loads of options,
and its great to see you on Bloomilk.
(hopefully we'll see you around more on the forums and on the Customs forum)