You can buy SS tube from most plumbing places (Enzed, Pertek etc) dull or shiny.
I have a lot of my system hard plumbed (mostly SS valves and lines + copper HERMS coil). Pics are in my gallery
http://aussiehomebrewer.com/gallery/album/1075-ag-herms-rig/
To clean it after each brew day I run 80deg cleaner (alternating between PBW and Pink Phosphoric) from the HLT and circlulate it through the HERMS and MLT for 30 minutes, then the BK for another 30. Then sanitize with starsan after using the same process, HLT-MLT-BK...
Brewing once a week means I don't have to worry about gunk as much.
