I catch spiders all the time, I use an old large batman soda cup I got from Tragic Molehill, Big cup, heavy plastic straw, lid that snaps on tight. All you need is a something similar, Something about the size of a sheet of paper but more rigid, and a herding stick. Although the paper sized sheet will work for the herding stick also.
Put the cup in font of the spider and use the stick to prod it to move into the cup. Or, Place the cup over the spider, then lifting the cup just enough to get the paper under it, slowly push the paper under the cup till you can lift it and the cup up to walk outside. Just don't kill in the cup, the poisons are toxic to humans as well, and I'm sure you wouldn't want to keep it close by if you did. I always have a reaction anytime anyone sprays ants in my house.