If you have a concrete floor, raising the speaker cables is not crucial. Abroad, many raise it because they have wooden floors, where vibrations get transmitted and hence feel the need to lift the speaker cables off the ground.
I prefer mine on the ground. I have tried several branded cable lifters but have always preferred the cables to be on ground. Sounds more natural IMO
If you wish to lift them, get some Jenga blocks which kids play with. Use these blocks to raise the cables off the floor. And see if you like them. These blocks you can get at a toy store