Hi,
It might be a bit of a long shot, but I am on the lookout for a 4ft Power Twist, Power Groove and T17 tube.
Over here in England such tubes were never manufactured as far as I am aware but I would love to get hold of these lamps one day.
I am happy to do a trade or would also pay if someone is prepared to sell any such spares they might have.
I'm hoping to visit the US next year as I have family in Arizona and Georgia if international shipping was a problem.
Thanks