What companies offer a moneyback nappy trial?

I'm thinking of trying some bits and pieces, but don't want to end up with stuff that doesn't work for me and then try to sell it on. I know some companies offer a moneyback trial - you can buy nappies and bits, use them for a while and if you don't like them, you can return them used for a partial refund. Anyone know of such companies?
Thanks

plushpants.com do a trial pack that you can select yourself, though it's not with new nappies.

Your local council might do a nappy trial scheme, also worth contacting the Nappy Lady or Lollipop to see if they do anything similar?

Babykind.

There's one on the tip of my tongue, I WILL REMEMBER!