Last ditch effort

So my 13 month old, chunky thigh’d baby boy has outgrown his diapers! 😱 I have the legs on the largest snaps and they still leave grooves! I posted in a FB group and someone suggested diaper extenders, even had a link... but the link was for a French Canadian shop that didn’t ship to the States. I don’t know if it’s just me, but I can’t find ANY place that is currently selling snap diaper extenders, I’ve only found hook and loop. Can anyone help a girl out! I don’t want to have to stop cloth diapering if there’s a way I can stretch it! I’d even take a pattern at this point and I’d put my limited sewing skills to work. Or if anyone has any other suggestions, please help!