Worm gear motor recommendations/ help

I am looking for a worm gear motor that can lift about 700g and hold it comfortably. I tried this one: http://www.hobbytronics.co.uk/worm-drive-gearbox?keyword=worm%20gear%20motor

But it just isn't strong enough.

Does anyone have any recommendations, or advice on what to look for (I'm new to this kind of thing). There doesn't seem to be much choice out there for worm gear motors, unless I'm just not looking right..

Use a car power window motor. .

You don't say how the worm gear lifted the load. A worm gear rotates, so you have to use something else to convert rotary to linear motion and that itself affects the load ability.