Most things, tubes to chemicals are available cheaply! BUT only in bulk quantities. If I wanted 1, 10 or 100 tubes the delivery would cost more than the tubes, If it was 10 - 100 thousand tubes a year then suppliers would be beating a path to my door with better offers inc delivery!
In hobby circles you are going to pay a fortune for small quantities. then have delivery added on top. Look out some sizes of tube that have common use in your locale that would have crossover uses. Till roll, fax roll etc paper cores. Look out the companies that prepare till rolls from the mill rolls and ask them for paper cores.
Go chat to a paper converter (there has to be one in your locale) someone who takes paper in the roll from the mill and converts it into sheets, small rolls etc.
There will be a paper tube supplier, just that they haven't thought to supply tubes to hobby pyro's.
Maybe they dont want to sell to people who want to make illegal or inadvised bangs or devices. No responsible trader wants to be "by appointment to Al Quaeda" ot the like.
If you have a large photolab nearby try to get the cores from the larger sizes of roll photo paper. Kodak, Fiji, et al make paper on 3" bore tube with about 10mm walls. Mini-labs will have 6 and prob 8 and 10 inch. Pro labs for the advertising industry will have up to 60 inch.
Edited by Arthur Brown, 14 September 2007 - 09:40 AM.