Medford, OR carries all this stuff in several different sizes in white plastic, alum., and brass. If you need a mini-tube cutter for this, it runs about $5.00. I'd also recommend a reemer (another couple of bucks) to 'de-bur' your cuttings.
The tubes are all a foot long and several don't weight 'jack.' The mail bag will cost more than the postage.
Let me know what you need and I'll ship it up to you in a couple of days.