Hydraulic Cylinder Part Identification please :)

[FishFever441]

Hi Guys, My buddy has a Terramite T5C that at this point I have almost completely rebuilt for him lol. I disassembled the boom cylinder to address some nastiness to the chrome on the rod. He had the new seals installed by a Hyd shop and the unit reassembled by them. After a couple hours of use the rod blew out of the housing and sliced the retaining wire in half. To my absolute surprise the wire was ALUMINUM! When I disassembled it I am 100% sure the wire was steel and now the guy at the Hyd shop is denying he ever even rebuilt the unit. I was present when he took it in for repair! haha

In any event I and having a devil of a time finding this mystery piece of steel anywhere. Can anyone point in the direction to purchase it or is there an alternative someone has derived?

Thanx!