3 month - best chubby baby clothes?

Ma

My baby is 3 months old and already 17.5 lbs! He's exclusively breastfeeding, but he's just tall.and big 😆

The problem with finding clothes is he has such a long torso and short little legs. The pants that fit his legs in length end up being too tight on his big baby tummy!

I literally have him in a pair of 18 months pants right now because the waist fits, but obviously they are too long (just rolled them up).

Does anyone else have experience with this? What brand is best for heavier babies with short legs?