Can't find wide kitchen bin liners

I have spent 3 years trying to find liners for my inbuilt kitchen bin. It's only a Howdens kitchen so there must be thousands like it.
It's easy to find them tall enough but the tops aren't wide enough to be secured by the clips on the top of the bin. I'm currently using Lakeland drawstring tall liners which according to their measurements should fit but they don't. I'm having to snip the top of the bags so they stretch more but it's still not satisfactory.
I can't be the only person who has this problem surely? Any recommendations would be appreciated.