Bathroom window
Hello,
I'm not sure what part of the window is shown in your photo at first glance. If the trim or part of the window jamb is damaged, unfortunately, that is not something that we would be able to supply. If you need weatherstripping or glazing, we would need to see an end profile of an intact piece removed from the window to compare to our inventory. Thank you.
I can't be sure but a jamb liner is the only part that comes to mind that would fit your description. If that is the case, your best bet would be to contact the manufacturer directly.
If the piece is just used to cover the support balances, that is also not something that we can supply but you may be able to find replacements at a local hardware store.