How much to convert a hard top to a station wagon?

[stevo6]

How much roughly does it cost to convert a 90 van (hard top) into a station wagon? In other words, to cut holes and put windows in, some seats and any other trim?

[RV8]

I've got forward facing seats, are about £250 new. They are safer but I prefer the older side mounted seats.
I asked about having windows fitted when I was looking at getting a landie and the local garage said £250 - £300 depending on what I wanted (not including the high level windows in the roof.
Headlining kits can be picked up for about £50 second-hand.

[bracken78]

I think there might be more to than just the interior. There are some metal supports connecting to the chassis which the HT will not have.