I contacted a couple of shelters/organisations that deal with women's shelters, and one got back to me!
They seem keen on the idea of having cloth pad donations, and said they were packing up 150 hampers next wed, and if I'd like to, I could include a cloth pad in each one. One pad isn't going to be helpful, but we've got around 180 sets, so we could give a set to each.... but I'll decline...because:
1). I really wanted to get these overseas to impoverished areas - and that's also what assumption the other donators were working on.
2). Ideally the cloth pads should be given as an option to women in/leaving shelters... because otherwise they are likely to be thrown away and not used. So just putting them in a hamper is probably not the best way to distribute them.
3). I'm still hoping to hear back from Oxfam.
However.... now that I've made contact with them, we might be able to gather donations for them down the track. And to at least have a place to say "if you'd like to donate a few pads, you can contact these people" is great.
I was in an abusive relationship once, and ended up having to leave with only the clothes I was wearing and no money. So to be able to help out women who were in my situation (or worse, since I was able to stay with a relative - some women have nobody) is quite a good cause too.