window channel balance

I need help finding exact window channel balance.
It is 30 inch in length and has stamp "2940"
I have attached pictures of all top and bottom parts.
Please help me find this



Thanks for reaching out! These will need to be custom/special order balances, given that you have a wheel in the shoe; they are Extended-Travel Balances.
I am not able to see the clip or hook attached to the shoe of the balances in your photos. These balances typically have them, so you'll need to find an undamaged balance.
Keep in mind, custom orders are non-refundable and non-returnable. So it is important to confirm which clip/hook your balances have.
Please also be aware that there is an order minimum of (2) balances per custom balance. I'll need to know the exact number of balances you intend to purchase.
Once I have this information, I'll be able to get the link sent over so that you can purchase your balances.