I actually have a Rival vacuum sealer...much cheaper than a FoodSaver. I think I got it for $20-30...nothing fancy, just vacuums and seals. I even think Wally World sells them. It's a good investment to make especially if you will be getting hops in bulk so that you can preserve their freshness.
You might be able to use ziploc bags and try to get all the air out, but that would probably be best suited for short term storage.