replacement sash

Hi,

I'm hoping to find a replacement for this part on my window. It looks like it caps the top of the window and is part of the face slide against the aluminum frame. I didn't see anything like it in your sash selection but might be looking in the wrong place. Everything else i need was simple to find and so i hope you will carry this too. Very anxious to start repairing my windows instead of costly replacing them. they're still in good good enough condition to fix.

Thank you,

Bill