Andrew,
Asking for an estimate without a visual inspection is absolutely
imposssible.
It's like asking how much air is in my tires, without putting an air
gauge to them.
Take the Van to a local body shop.
They be able to give you a more accurate estimate, than anyone on the
list could without actually seeing the damage.

Later,

  ______________
 |[  ] [  ] [ ]\
 |    |    |    |
||-(())----(())-|

Terry 85 GL