Does anybody know a supplier of heavy duty wheel barrows ?

I've had one for many years that took everything I could throw at it,
concrete, bricks, stone etc. but it's now finally given up and I can't
find a replacement. The builders merchants hereabouts sell barrows
that are just about capable of transporting soil/sand but nothing more
substantial. :-(

I've got 10 tons of Purbeck stone that needs shifting over the next
few weeks.

Cheers,

John