Question for Tangent Appliance

Is it possible you make Boiler elements with the following specs 320v 4kw 500mm,We want to use it on our boiler which obviously has very high temperatures.What could be the cost involved.we use are using about 50 units per month which means we are a product which is not strong.Let me hear from you.Iam the Storekeeper at Sabi gold mine in Zvishavane