TC Contender barrel locking bolts?

[Don45]

Does anyone know of a Canadian source for the locking bolt for a TC Contender barrel? I have one barrel I just got and it has the old single piece bolt and it is giving me some trouble so I am hoping to find a newer 2 piece one and replace it.
I have tried Ron at Nine35 but so far he hasn't had any luck finding any for me.

 

[fridge450]

Very interested,need the same.

 

[BattleRife]

I also have a barrel that would benefit from upgrading to the 2-piece design. I looked around when first I got the barrel, but no luck.