I got my 20 & 22mm shrink from modDIY the same way. I haven't tried to remove it yet, but I did go ahead and use the 20mm -and your "hot knife" method- to prep and resleeve my USB 3.0 cables.
Tomorrow I will experiment to see what removes the printing. I can't imagine there would be much to it, but you never know. I have acetone, paint thinner, "goo remover", alcohol and all kinds of stuff around here to try.
Maybe I'll at least get a buzz.
Of the white male fan connectors, they seem pretty scarce. Even the black ones aren't carried too many places I know of, and I don't think they are even stocked, or made by any of the US companies including Molex, Mouser & Newark.
Here's a place that advertises 7/8" shrink tubing:
http://www.cableorganizer.com/heat-shrink/heat-shrink2.htmEDIT: Alcohol seems to work ok on the heat shrink.Edited by mandrix - 11/26/12 at 6:41pm