www.mcmaster.com and you can get the number there. They have a 3" thick catalog of probably all the tools/gadgets/parts you need. Catalog is hard to obtain though from what I hear.
The internet site is easy, and you can pull the stock# and phone order for pick up in Elmhurst. It's on the west frontage road of 294 between Grand and North. It takes 2-3 hours to pull your order if it's in stock. Just run a search for acrylic rods on their site.
Where can I buy arcylic tubes and colored arcylic sheets in chicagoland area. I have tried the phone book but can't find a company who sells this stuff to the general public.