What's wrong with the lining, have you tried putting it in the dryer on hot for a bit? I doubt that you could replace the lining very easily as the seams are heat sealed.
It's a monkey foot one but other than that it would have been who ever had the size and design I wanted in at the time it's just blooming frustrating as DH lost my favourite WN out and about wetbag last week with my favourite nappy hopefully this wa my three