Welcome to the gang Dan and Annette, enjoy here and out in the playground.
Being an Austral Coach and you have found two places can do the job I would make contact with both and choose one of them. Not all palces can work on the big beasts.
Once you have decided etc make sure you pop in here now and then and check out all the different sections.
Keep Safe on the roads and out there.
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Live Life On Your Terms
DOUGChief One Feather (Losing feathers with age)
TUG.......2014 Holden LT Colorado Twin Cab Ute with Canopy
DEN....... 2014 "Chief" Arrow CV (with some changes)
I would be surprised if O'Briens in Cairns cannot do it as they do windscreens and glass replacements as long as the glass is flat not curved. Even if it's a special they would get it in and replace or let you know where to go. Ph.1300732044.