Greetings
I recently purchased a 100' box of Clearflex60 clear PVC tubing from a company called Fabco Plastics, in Maple, Ontario. Their sales rep says it is equal to Tygon R-3603 Lab tubing. However, at $1.55CAD per foot, it is approximately one third of the price of Tygon. I am going to be using this tubing in lieu of Tygon in my next watercooling project due to it being far more economical. I will, however, only need 20 odd feet of the stuff from a 100' box, and as such will be selling the rest. If you are interested, check out my thread in the FS/FT forum, or e-mail me directly.
You can find more info about Clearflex60 tubing at the following web address:
http://www.fabcoplastics.com/catalog/section7/7-009.pdf