The chap I bought them from had them made especially for his landy. Will upload discripton and dimensions, in a mo.
I just searched van drawers on eBay and it popped up!
They are made from flight case wood (whatever that is) very strong and not very heavy.
There's a lot of drawer units for defenders which would fit (pretty expensive) as I nearly bought one.
I think I still have the guys contact detail so can try and get more info on where he had them made and cost.
I paid £200 for them.