Crossbow balance

Attached are photos of a crossbow balance system I was told either it can potentially be replicated or convert to a u-channel system.•The window is weighs ≈ 15-20lbs.•The t lock is 1-1/4”•The balance system I believe is ≈28-3/4” when not broken, unfortunately all 4 balances are broken on this window.
And there is a number on the plastic piece PAT #5.7 37.877
Any help would be greatly appreciated, would like to order 1 for now to test it out, then order the rest.