Bargain box has it. The last time it was about $16 a box, that was a while ago. Why don't you ring them on 32022887 that is Ipswich and ask if they have it and the cost. maybe you could take a trip to the store as they have a great range of fabrics there and they are getting more in all the time, great prices too.
that is a reasonable price$17 for 50 yards.There are a lot on E-Bay too but they are in England.