Glazing from the top window of a newer mobile home

Hello, I have this glazing strip that I need to get replaced. I did order replacements from this website, including the item. I did send them pics too. What I ordered from them did not have the little step down allowing it to snap into the frame. Theirs was to tall to work. The dimensions of the old piece is 5/16 tall, top to bottom, 1/4 from the bottom to the top of the groove. It is 23/32 wide. Hopefully this helps.