The PP ones are good becase they tend to not be fleece bags.
The other option if you know someone handy with a snap press, is to get some extra snaps put on each arm hole and neck hole (obviously theres only one lol) to reduce the size of them, the issue is baby falling in to the bag if they are too big, more so than the length.

Theres also a brand called dreambag which are about half the price of grobag and quite good also.