Not quite the same, but I vote didgeridoo. You can a PVC one off of ebay for $20-50 and are quite easy to play, harder to master (as with most things).
VERY meditative, I've used didgeridoos during Aya cerimonies and it is amazing. My friend and I have two that are almost perfect pitch, and we play didg duets (I guess)....Amazing during Aya, or even if a friend plays it during a vaporized launch.
Again, not the same as a singing bowl or hanging drum (good luck getting one of those, 2 guys make em, that's it, and they are backordered for years from what I understand.
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