I was in the same boat, but i just switch my top off contanier to a rubbermaid trash bin. it takes the same amount of space, isnt as brittle as what i was using, and has a removeable top. if your not married to your top off container, spend the 10 bucks to get one.
i understand the principle of an external priming pump, but i wouldnt sleep well at night relying on it to suck up to prime.