hi ya there MCR
or Mark
give Whitburn Model shop a ring - they have ordered modelling plywood in for me 8 x 4 sheets - at 4mm thick and also 6mm thick. Not bad prices, but, it does take a week for them to get the stock in for you - its Whitburn Hobbies - telephone: 0191 529 55 99
good to deal with - they deal mainly with cars and planes, but have some modelling stuff in for boats and a good set of lads.
aye
john e
bluebird