Rack Blanking Panels

what do you like for modern blanking panels? been using these snap-in 1U APC jobbies -- they're cheaper than the metal ones that you screw in (from monoprice anyway). have you guys got a favorite thing?

back when i was at the mill we used this paperish stuff that you could rip off to size and clip in with these little plastic doohickies... can't find the product online anymore (Tyron Turner, Steve Smallwood -- if you're reading this....).

i've got nearly a whole panel i want to blank and while i could easily cut up the boxes my isilon just shipped in, they're not exactly attractive, or reusable, or great heat reflectors or, or, or....