Ive ordered from inserts from a lady I found on ebay. She is making me some pocket nappies and inserts. The nappies are really funky, made with a zebra pattern material.
Maybe u could email her and order some inserts.
I havent bought any others except the ones I got with my Bumgenius nappies and they are really good. Very absorbent. I know they sell them separately if u want to buy them. I bought mine from Nurture Nappies online.