I haven't read through all the posts but i got a great one from tescodirect, i got it in the larger size as LO is now nearly 8 months, unless I've got the wrong idea about what you mean.
https://www.tesco.com/direct/by-car...months/214-3774.prd?pageLevel=&skuId=214-3774 I wasn't mad keen on the design at first but it has been a great bag.
Edited to add I think I've got the wrong idea sorry x