Prep and Paint Cab Only

[72malibu]

I'm helping my dad get his 75 GMC pickup back on the road.

Super nice $2,000 replacement cab is off the truck and stripped of parts. My dad had a shop blast the cab, repair rust in one small spot, and prime it. The cab is coming back unfinished b/c the shop refused to give even a ballpark estimate on prepping and painting the cab. Cab alone, no doors, and no surprises because they had it in bare metal. They kept saying "time and materials." I think they were planning to take my dad for a ride.

Any thoughts on the cost to finish prepping and painting a really nice cab that has a base coat of primer? Two colors for the middle stripe. I'm tempted to look for a MAACO to take it to. It's going to be a driver, not show truck.