A cable release is probably the single worst place to look for brand names. There are different qualities, yes, but the quality is unrelated to brand name. Buy a few dirt cheap ones, and use the one you like. You will need at least two or three, as you will likely lose one somewhere in the urban jungle. Gepe, Kaiser, Hama, or any offbrand is just fine.
One quality factor in a cable release is how much (little) momentum it transfers to the camera. Longer ones are usually better. for wideangle lenses you are OK with a short release, but if you want to use the T-lock for long exposures then at least a foot or more length is practical to let the release hang far below the camera.
So: got to the local camera store and find whatever offbrand release they have, and get that one as a that one as a starting point.