Return transfers on the cheap?

Hi,
I am doing the Overland Track in February with 4 other queenslanders (5 in total) and want to find a way to Cradle Mtn from Launie and be picked up form Lake StClair and dropped back to Launie. Does anyone know of someone who will do a bus transfer this for less than $400 all up?
I am doing the Overland Track in February with 4 other queenslanders (5 in total) and want to find a way to Cradle Mtn from Launie and be picked up form Lake StClair and dropped back to Launie. Does anyone know of someone who will do a bus transfer this for less than $400 all up?