E-series hinges are bolt-on. Probably a 1-hr job a body shop, if that. Since your van is white there should be an abundance of matching parts at the salvage yard. But I do agree its possible the pillar was bent, or the mounting pad on the door side.
The studs are long enough to do a little shimming on the pillar side. Really you can probably repair it in your driveway. The wire connectors are behind the kick panel. If it's only a little off (after you replace the hinges) you can probably make some adjustments on the door side with a big hammer.