Might want to try Petedge.com. They have a huge selection of exercise pens -- some lower price & quality like these and some better. The black ones tend to rust very quickly, but you can get one here for only $28. Here is a same size gold zinc alloy coated pen for $38
ProSelect Goldtone Exercise Pens | PetEdge.com They have pretty colored ones for $38 and higher quality ones for up to $169. I prefer the medium road plastic/polypropolene ones -- never a worry about rust, lightweight and they clean up easily.
As long as you have a $60 order, you don't have to pay a sucharge with Petedge. When you see the great wholesale prices, it is easy to come up with $60 in orders. If not though, you can always combine with another pet-loving friend. I have had great service with Petedge and orders come in quickly & well-packed.