If you're going to use them within a month or two, then you should be able to keep them in a plain old ziploc bag in the freezer without a problem.
If you really want you can use the 2 bags and a straw method to get an OK vacuum. Put the hops in one bag and seal it most of the way leaving about a 1 inch opening. Stick this bag inside a second ziploc bag. Stick a straw in the outer bag, but outside the inner bag and seal the outer bag on the straw. Now suck as much air as you can out of the bag through the straw. While maintaining suction, seal the inner bag. Then pull out the straw and seal the outer bag. It's not a Foodsaver, but it will be passable for a while, especially at freezer temps.