Tilt window parts needed

I have two windows with the hardware as shown. The first is a spiral counter balance...I have seen these in different sites. The other, the spring spiral i have not seen in my searches. Both have the same type of bottom connector...they have little metal dowel type appendages that stick out and they slip into a channel where they are braced. The spring is 3/8 of an inch wide, the white plastic casing is 1/2 inch wide. Any information you can provide greatly appreciated. I need 2 pair as there are two windows...both in poor shape, rusted and their plastic channels broken.