There aren't really any speaker stands for tower speaker, you will have to make something yourself,
Weeeel, this is not entirely true. There are a lot of companies that make these mid-size towers that need elevation:
Few series from PMC alone.
These stands elevate and tilt:
A lot of older speakers ha stands similar to the picture above. If you're not a handy-man, I'd check audiogon for something like this.
These are simple (and beautiful IMO), but they only elevate:
Then you have these that might make tilting safe, but they hardly elevate at all (these also say JBL on the front, but I'm not sure is it real):
These are custom build, so you probably won't find them on Craig's, but I put them to give you ideas if you want to build them yourself:
These were actually quite common. I always see Spendors lifted on these so I guess they were produced for Spendors (not sure):
These were on the Audio Mart website. My guess - expensive: