I have a 5.5 month old who is very long for his age. My current baby bath seat (Tigex by Modele Depose) states an 8kg weight limit. He's not this heavy yet but is too long (and wriggly) for the bath. I have checked the internet for a similar bath in a larger size as he is not sitting up yet, but all there is available are similar seats with 'from birth' as size claim. Any ideas?