Ezimetal - Unipiers
Here's a great affordable steel piering system that just about anyone can use. The posts come in two sizes, each with a range of different lengths. The slip-on pier head incorporates an ant cap, ready for your bearers and floor joists. The whole lot is hot-dip galvanized for long life.
Need adjustable piers? You might want to look at the Duragal Flooring System.