Bottom Window Seal

I am not sure this bottom seal (3/8" long) can be replaced. They are inadequate anyway in my opinion which is why I had to add that gray foam strip on this window in the kitchen. I would even be happy with a bubble foam filled weather strip that glued and or screwed on the bottom of the window. The flap also should be a little longer as it does not always touch the window. Do you all have a product that will fix this problem? Cheap contractor windows I know but not ready to replace them. I am going to replace all the pile weatherstripping with item 58-127 when I figure out what to do with these. A Dremel tool works wonders when modifying these windows. Already replaced the Pivot Shoes on all 13 windows.