I believe one of the guys at TAD Gear had made some and mentioned how much of a pain it was to work the paracord over the coil, so they're not offered for sale there, but lots of cool stuff to browse anyway if you check 'em out.
I bought a couple of cheap coil lanyards off the key chain rack at walmart last year and tried it myself, quickly giving up on it. It was taking forever to 'inchworm' the cord over the coil. The problem was that the coils I first bought didn't have a metal crimp with a hole in the end on the ends of the coil. I found some that did, at a grocery store for about $1.50 each.
After reattaching the crimp, I added small split rings to each end and a swivel clip to one end for attaching to a belt loop. At rest, the paracord covered coil measures about 6 inches long and can be stretched out to just over 3 feet.
On one of the forums, someone mentions stretching the coil straight and pulling the paracord over it made it easier, but I'm not sure how they did it, maybe someone can chime in on this. This one should work fine to attach to a flashlight, multi-tool, knife, key ring, etc.
If you want one and know you're not going to make one yourself, there are a couple of guys on one of the forums that were offering the hand made lanyards for sale in the buy/sell/trade section, or you might try googling for a 'coiled lanyard', or try one of these from berkeley point.
Another option might be to try using a wired home phone coiled cord or recycle a car cell phone coiled cord, using some duck decoy crimps on the ends. I dunno if 550 paracord sheath would fit over those though, some more obscure larger diameter paracord might. Then you'd have the copper wire inside the coil to strip out if needed for some potential zombie apocalypse survival usage, lol...