Walkley Clogs do a few options, they are a little but over €150 (but in that ballpark), they do several style of paraboots, from reconditioned ex-army, resoled new army, and new high leg style. The rubber soling option (it's a walking boot sole glued and nailed to the wood) which I have) lasts around 1800km between replacements (depending on your gait and the surfaces you're walking over). The wooden soles are basically indestructable, the leather uppers will last for as long as you look after them, being clogs there's no bending in the sole so you won't get pinch holes in the uppers as you would with rubber soled shoes and boots.

They do exports, but I don't know at what cost, it could push it well over budget.