E-brake and shock help

[gmcer]

hey guys thanks for the help so far and trust I'll need more than this! I have a 1950 GMC longbox 3/4 ton, keeping it mostly stock that I put in a 59' 1/2 ton axle in. I need an emergence brake cable, what do I get ? The auto stores don't carry much or don't have a clue to cross ref. up to what year will cross? also had knee shocks that I am putting in conventule shocks in same problem. also having drive shaft issues but will tackle this first. thanks again for your help