I've got some ex-trial bamboo ones - Ethangelie and P'tits Dessous one size ones. PM me if interested, and I'll dig out what I have and give you some more details.
ive got some newborn size prefolds ( im willing to sell some ) that work perfectly as inserts in pockets hun ive been wraping them around the MF insert or tri folding them underneath and they dont add much bulk but quite a bit of absorbancy and dry just about as quick as the MF