Not cheap, but a very good value:
http://www.burlinghamsports.com/store/products/888/jumps-and-accessories
These are NOT PVC, and they are tough. We like them because you NEVER have to paint them, there are gobs of different designs, and they are easy to move around. Unless you’re in a windy area, you don’t need to weight them with sand in the bottoms. Ours never blow over, even with heavy winds… and they also don’t splinter.
When you figure out what you spend painting wooden jumps, and how they tear up your hands, and are like lugging huge boulders around… these made sense for us. Their poles are nice too- wooden poles incased in strong plastic that won’t shatter. The weight of a wooden pole with the easy care of plastic.
And the prices include freight, which is a huge bonus.
Worth considering… when you really evaluate all the pros and cons of various jump types. If you want to buy jumps every decade or so… take a look.