Assemble garden shed

Hi, I'm looking for someone who can assemble a garden shed at a new house in Birkdale QLD 4152. The 3m x 3m concrete pad has been poured. The house is brand new so I need a decent quality shed (with window I reckon) to be put up by a perfectionist :-) Job will include collecting shed from whereever we buy it (I imagine it will be flatpack so easy enough to transport) , taking it to site and putting it up, preferably in the next couple of weeks before house is tenanted-