Need to replace springs balance to 2 sash

I think we can help with this. We don't sell this as one assembly, but we do sell the different components separately. See our 15-180 pivot shoe, Series 190 coil spring, 15-186 clip, and 15-182 bushing. Please let me know if you had any other questions.

I agree that the parts that Tom recommended appear to match yours, though you'll have to remove your original parts from the window to confirm that the specifications match up to ours.

As for the coil strength options, there should be a number stamped on the base of the original springs that you can read once they are removed to choose the corresponding strength options. If not, you'd need to weigh your window sash and divide the weight you the number of coils used on both sides of the sash to choose the best strength options for your window. Thank you. 

You can use one of the S190-740 coils on each side of the window to support a 14-pound sash. Let us know if you have any other questions. 

I'm afraid that I'm not familiar with your area. Our only location is in South Jersey and my knowledge is limited to this region. 

A local hardware store (like a mom and pop shop) might be able to point you to someone they trust. We also have a general video on how to install coil balances; it doesn't feature these exact parts but the principles are pretty much the same. It may be of some help to you.