honestly, who has hops around long enough that keeping in a ziplock is a problem? my hops get used us faster than they are going to oxidize in a vacuumed out ziplock in the fridge...I have had some hops stored like that for 2 months with no noticable degredation...
Some members have ordered 5 lbs at a time from HopsDirect or Freshhops. With that quantity you'll want to use a vacuum sealer.
Unless you only brew IIPAs, of course.