That's only slightly too much for the thick (6mm) stuff, which is expensive, but the 4mm type might be adequate for your purpose and is a lot cheaper, more like £6.00 a sheet IIRC.
yeah 4mm might do but its the board itself that gives the panel rigidity.
Also needs to be tough as they're going in a couple of youth centers , bats, knives and bullets flying all over the shop!
Tried most of the trade outlets i can think of really, just thought it was worth asking here.
The board will be covered with carpet so just pop a load of holes with a drill or hole saw instead i think.
Couple of different hole sizes may be better acoustically anyway.
I swear last time i built panels pegboard was much cheaper... maybe not.