Replacement window parts for Applewood Window

I have a window with 2 broken parts. The first is the small plastic assembly with what appears to be a round metal weight which slides up and down in the window frame and the second is the small spring loaded clip that holds the top of the lower window into the frame. The dimensions of the clip are 2 5/8" X 11/16" I have attached pictures, if better ones are required I will be happy to take them. I have tried to contact Applewood but have had no success and they do not appear to have a website.

Thanks Tom: I think that these will do the trick. I will order them and will let you know how it goes. Thanks again.