sand/media blasting of a large item?

[underpowered]

looking for someone that has the capability to blast a large item, like the Flat bed on my truck.

ideally it would be great if they had a stand alone setup that could blast the bed while still on the truck as it is very large and heavy, but if need be it could be removed to go in a large room to blast.

I am just looking for a link to someone that can do it, as i figure it would be much easier to blast the bed before paint than spend Hours sanding it down to be painted, as it already has 2 layers on it which are flaking.