Homemade 6 inch tall stands for small floor stranders

Yep. + 1 to @yogiboy 

It's the first thing that came to mind. Easily painted/covered. Cheap. 

For, you know, temporary until you find the good ones.

same thought-

Ot these:
http://m.homedepot.com/p/10-in-x-10-in-x-10-in-Concrete-Deck-Block-55N1AN/206125490

I like that!!!  Get some of that Flex Seal rubberized paint and paint them and put extra coatings where the speaker will sit and then the bottoms shouldn't get scratched up, I would think.  

Used bookstore, a few unwanted hardcover books (encyclopedias, dictionaries, etc.), a handful of long screws.