I am in need of some seamless brass tube of 1/2" diameter and approx 12" long. However, I also need similar tube to telescope with it, both inside and outside. I have seen the K&S metals that many 'model' shops seem to stock, but I'd much prefer something with a slightly thicker wall than their standard 0.014" which is commonly found. The K&S website seems to show a few sizes with 0.029 wall thickness, but I have no idea who might stock this in the UK -any help appreciated!