Chuk
albion are a local company to me in the UK, i have lots of the stuff. I knew someone who worked there and he was very good at getting "samples"

If they do a size that is a problem to get over there just PM me what you want and i will send it out from here.
This is the smallext they do in brass
I use the MBT05 for turn buckles on WnW kits
Micro Brass Tube
Code: Dimensions (O.D.-I.D.-Length)
MBT03 0.3mm x 0.12mm x 305mm (3 Pieces)
MBT04 0.4mm x 0.22mm x 305mm (3 Pieces)
MBT05 0.5mm x 0.3mm x 305mm (3 Pieces)
MBT06 0.6mm x 0.4mm x 305mm (3 Pieces)
MBT07 0.7mm x 0.5mm x 305mm (3 Pieces)
MBT08 0.8mm x 0.6mm x 305mm (3 Pieces)
MBT09 0.9mm x 0.7mm x 305mm (3 Pieces)
MBT10 1.0mm x 0.8mm x 305mm (3 Pieces)
A tip for cutting it. place a very sharp blade on the tube on a flat surface, apply a "very" light down ward pressure and move the blade forward so the tube rolls on the surface and the blade will cut, get it right and there will be no bur on the inside Dia.
Cheers :drinks