At some point in the future I want to cover a 3 meter wide wall with shelves floor to ceiling to build a filing system. I'd like to add doors and a bottom hinged writing surface to hide the lot away. The plan is to use oak veneered mdf or similar for the shelves but what to do about the doors?..
The doors we are using in the rest of the house are these from JBKind...

Ideally I'd like to make doors that look like this but are thinner. More like kitchen cupboard doors?
I was thinking of assembling them from 20mm engineered oak flooring ...but the back and edges wouldn't look great. Can you buy oak veneer these days or is it horribly expensive?
Perhaps 14mm engineered oak stuck to oak venered mdf would be better? Then just veneer the edges? or would that warp as it's unbalanced?
We could be talking about as many as 18 doors so the simpler the better!