Im not sure how you would contact them being in a different state but theres always the other way, i can do it for you? (plus i get guild discount !!
%), otherwise its called Guild Copy and Design center email:
copy.design@guild.curtin.edu.au . As for getting colour fidelity, the only thing i can do for you is make sure that there isn't any funky colours on my calibrated monitor then make sure those colours don't change as they go to print. its kinda hard when your printing that way as your monitor has a limit to its colour reporduction.
they even do upto A0 at 80.50 per print 841x 1189 ... thats huge
Photogloss Prices are
A4 12.50
A3 15.50
A2 30.50
A1 50.50
A0 80.50
and since they print from a roll, you can go longer (panoramic) at 4.50 per 100mm
there requirement are CD,USB/external HDD's
PDF, JPEG, TIF, PSD though the layers have to be flattend.
let me know if you need any more info