Need Suggestions For Raising Speaker Height

You can cover cinder blocks with an attractrive material which would work well.

I found some very inexpensive butcher blocks at Home Goods...painted them flat black and put them under my Silverline Prelude's bases. Perfect, and they have different sizes of the blocks so something should fit. I have Vibrapods under the Preludes (they sound better with these...who knew?) and little rubber feet under each block (stacked 2 per side) so they don't slip around on each other or my wood floor. I have to say...these are the most successful speaker tweaks I've ever done as they made a good thing even better, although using the Vibrapods under speakers violates some long held audio "spike 'em to the floor" convention. What can I say? I'm just so damn rebellious!

What Timlub said. I cut pieces of MDF to fit and glued a couple together to get the correct height. Did the same for my Kestrels just to try it. Very simple fix.

Skylan makes very good stands. Most of the recommendations will degrade the stands. There are only two options. Tilt your existing stands or buy new stands.

Skylan makes excellent stands. Most of the recommendations will degrade the quality of your stands. I see only two options for you. Tilt your existing stands to aim the tweeter at the desired height or buy taller stands.