i.d. the best andersen storm window retaining clips

Hi, I recently purchased a home that has Andersen windows, both casement and awning-style. There are separate storm panes and the previous owners have used these white plastic clips which are sold as screen clips.In many places they are broke or cracked.What would be the best metal (more solid) replacement? As you can see the storm panes are mostly flush with the frame. The white clips are 3/4 inch long and 5/8 inch from screw to inside edge.

Also, what are the clips or brackets used for in the other two pics?

Thank you very much,
David B

Hi Dave - thanks for the help. Regarding the nylon clips - they would probably work but I was hoping to find a more durable, long lasting solution as the nylon clips appear to break over time? Do you think that perhaps the 70-003 (metal flush-clips) would work?