If the wooden bases really are solid and put the tweeters at ear height they might just work. Normally, dedicated stands tend to provide the best support. Though slightly over your budget I think the Atacama Moseco 6 (£120) would work well.
I have moved my speakers onto building blocks and I am staying with them. They do what stands are supposed to do and they do it well and they are very cheap.
Admittedly not for a living area unless you make them trendy looking but my listening room is an old workshop and I have painted the blocks black to match the speakers.