Another repair option is swaging.



Tube Swaging Techniques
http://www.youtube.com/watch?v=STl8aYYcpb4

Brazing steel tube.



http://www.google.com/products/catalog?hl=en&rls=com.microsoft:en-us&bav=on.2,or.r_gc.r_pw.&biw=1280&bih=863&wrapid=tlif131300872345310&q=swaging+tool&um=1&ie=UTF-8&tbm=shop&cid=12998385748188107104&sa=X&ei=aOxCTqa1I-eIsQK2-OmmCQ&ved=0CGYQ8gIwBA#

http://www.harborfreight.com/6-in-1-swaging-tool-66750.html