Window rubber flashing

I'm sorry to say that we don't have anything like this. Can you describe its function to me? Would it also be possible to see what it looks like installed?

Thank you! That's a big help. We do sell a couple different pieces that might work, but none of them match your original sample. The closest possible piece we have would be our 59-067, though I cannot guarantee that this will be a good replacement. Please look it over and let me know what you think.