i get my tubes from u.v logistics they are the cheapest around.
Are they for a salon or home sunbed?I have over 100 used tubes that have plenty of life in them, i am selling them on ebay for £3 each.
You have to fit them yourself but this is like fitting a lightbulb, easy peasy. Don't forget you may need to change your starter plugs too, these don't need to be changed every time you re-tube your bed but can occasionally go and is a pain when you have to change the odd one. x hth xx