In the middle of my MiniChunk build, and my wife suggested I hide a floor tile under a throw rug or a carpet, rather than the beds I had been planning on.

The only carpet I know of is the one from Castles & Keeps; the red carpet leading up to the throne dias.

Is there another option from any of the WorldWorks sets?

One quick, non World Works possibility - if you can get a sample book of flocked wallpapers you will have a wide assortment of carpets for gaming.

The Auld Grump

You can also Google "persian rug" or something and find some pictures to download and print.

Very nice rugs...that could be useful.

The CWU rug is 1.25" by 2.25" approximately

I haunt the junk mail catalogs, some of the decorator ones we end up with have nice photos of rugs, round, rectangular, all shapes, preprinted in the magazines, worked out just right for one of my houses. hmmm...website is: for those that don't get the same junk mail I do.

There's also three diferent colors of carpet in the Shellendrak Grand Piano kitbash...

There are a couple of slightly crumpled rugs in the Encounter Set (page 4 of the hilltop encounter) - eminently suitable as throw rugs on an uneven floor.