I picked up a set of three of the Porcupine Balls from Cabelas for a couple of stars I will be making next year, but I can't find any suitable pipes for a reasonable price. I've looked around for PEX tubing, but I can't find any rigid PEX. The closest thing I have been able to find is clear schedule 40 PVC from pvcfittingsonline.com. First of all, for this application, translucent pipe is a much better solution than transparent, and secondly, it's still $8 for a 60 inch tube. That's over $400 for a pair of stars. I can get PEX from Home Depot for just over $0.50 / ft, but 1/2" PEX has too small an ID, and 3/4" PEX has too large an OD. Where can I get something that will work for a reasonable price?