I think the liners would leak if they're wider tbh Have you tried differnt kinds of liners to see if you get on with one make better than another? I was gifted some gorgeous liners and they go on like a dream but I have no idea what make they are
I've ended up buying some fleece and minki and making my own. so far no leaks and they are nice and wide so no scrunching!
Although DH did ask today why arn't we using paper liners, he liked to throw away the poop - but now has to hose them down so not so happy! I really liked mothercare's own paper lines but they are like hens teeth and I can't be arsed in going to the store everyday to see if they have some in stock.