Outer Limits 4x4 Board

Hi,

Just wondering what I would expect to pay for a D90 Lpg tank?
I am looking to upgrade my out dated old tank that definitely won't pass an inspection.
I'll ring around on Monday but hoping someone on here might be able to chuck me a ball park figure.

Cheers.

Do you need a D90 or a D90N? D90N is more commonly available and it has the brackets welded to it.
I do have a unbracketed D90 which needs testing, has some surface rust but I think should pass.