Risers for short floorstanding speakers?

Hello,

I purchased a pair of Spendor 5se here on Agon about a month ago.  The speakers sound fantastic in my room, but they are short (30" high).  There are a few different chairs/loveseats/sofa that I have used in my music room, but being 6'2", and the height of each seat, leaves my ears anywhere from 6"-1ft above the tweeter of the speakers.  

Everything I've read on this forum about tweeter height levels, say at ear level or above is best.  I can achieve this by sitting on the floor, and the speakers do sound better when I'm on the floor, but I don't want to do this all the time, naturally. 

Has anyone used any type of riser/stand/block/slab/etc.. to raise a floorstanding speaker?

I have a pair of Auralex monitor pads in storage that I'm going to try, but I think they're only a few inches high, and not sure how they'll do on carpeted floors.  I might have to put a tile under them too.

Any suggestions from those whom have had this issue would be quite helpful.

Thanks