Or if you really want longer legs there is a procedure. They essentially break the leg into 6 pieces and insert screws into the breaks. These screws turn clamps that when adjusted break the bone apart again. So they'll turn the screws, break the bone and let it re-heal over a period of time. They do this 8-10 times and it's some of the most excruciating pain you'll ever experience.
Or take some GH, but the problem with that is it's non-selective in where it attaches to so you could end up with a huge simian forehead.