Where can I buy tubing?

I bought a Reserator 1 Plus kit... I've been very pleased. I might play around with my setup to move the resevoir futher away from my PC, but I'd need to buy some more tubing.

Where is a good place to buy the kind of tubing I need. I have a Lowes and Home Depot nearby... but I didn't see what I was looking for online. I am not concerned about the color, I'm just looking for functionality.

I think I can use tubing in the following sizes: 13 x 10mm, 13 x 9mm, 12 x 8mm, 11 x 8mm, 10 x 8mm

Thanks in advance for any recommendations!

Either of those places have cheap tubing you can use.
You can buy a roll, or by the foot.

it'll work for what you want, it's down by the fittings, & copper pipe.

I got a 10' roll for like $5.oo

I just bought masterkleer tubing from mcmaster.com (search for "masterkleer")

They have a distrib. near me (ohio) so if I order before they ship things in the morning I get the stuff same day. Can't talk about long term reliability but I think it was recommended in a thread here as a lower cost alternative for tygon tubing.

They are inch dimensions so here are the closest inside diameters:
1/2" ID ~ 12.7mm
7/16" ~ 11.1 mm
3/8" ~ 9.5mm
5/16" ~ 7.9mm