Brit,
Sarco has advertised that they will supply new made barrels for those who bought or will buy their L4 kits. I don't know how many kits they imported but its probably a good production run for a barrel maker. To date the barrels are not yet available. No availability date is promised. If you want their kit this would be the way to go assuming they come up with the barrels.
All,
I emailed to the supplier mentioned above in detail what I would want for a .308 barrel reline. i included a pic of a MkII barrel. All I asked about was the reline, no finish contours, fit up to receiver, short chamber, just install the reline. Told him it was for a semi.
Unless somebody is familiar with the Bren you would have explain in detail with a drawing to show what you want.
Here is the response:
"The liners are made from 4130 steel which is a bit softer than 4140. I don’t recommend it for 308. A new barrel could be made form a 30 caliber blank which would hold up as well as the original. The only problem would be fitting it to the action, I can’t have an automatic in the shop."
I won't pursue a reline any further. If I want the L4 barrel I know how to make one.
Joe