Inter Island large pet transport?

Aloha all, we reside on Maui, and our 18 week old, but currently 60lb great dane puppy we need to get to VERC on Oahu for a console with a specialist. Use to be that Mokulele would allow larger dogs to fly in cabin with them, but it seems their policies have changed. I don't want to put him in cargo unless it's a last resort, especially for the return trip after the possible surgery. Does anyone know of any othelir methods, or ideas? I even thought of taking the ferry to Lanai' and take Lanai air over to Oahu but seems they don't even allow pets at all. I know it's a long shot, but figured I'd ask. He's still a baby but we love him and aren't giving up on him cause it's not his fault he was born with this.

Mahalo