Noodle press from Amazon. I like the fact that you can get a serious amount of pressure, and it works well for small amounts -- I pressed just 10 grams of tobacco for that one. I don't know what the max is that would fit, but probably a couple hundred grams.
I'm doing 64-128g on the higher end the plugs are a little more loose even after several days. I'd imagine going above 200g you'd need to give it a week or more if you don't want it to expand on you.