Pampers cruisers might be able to fit your 10 year old son. But he most likely won't want to wear them since they have baby prints on them and they may make him feel more embarrassed.
Attends makes a youth tape on disposable diaper that should fit him. They're plain white disposable diapers so they won't make him feel as bad.
If he won't wear diapers to bed for bed wetting then you can get him some Pampers bed mats that will protect his mattress from urine.