You could look at Maz's covers, hers are fleece.
Then you have Baby Beehinds, which are PUL (same as the motherease, just different shape/style but made of the same thing)
Umm tots bots covers... hmmmm Bubba J.
there are heaps out there & yes, excpect to pay an average of $15 + unless you can find some on sale/second hand.
Try the auction site buy for baby. thats the place to go for second hand MCN!