Repairs to a sliding screen door

I need to replace both of these plastic pieces. The picture is the 'good' one. Okay, the broken one is missing the 'tit' (for lack of the proper word) that the 'pinchers' from the roller snap onto.

I would like two of the plastic pieces & two of the rollers.

I've measured and drawn a rough schematic depicting the actual size. Hopefully, this is enough info to identify the proper piece.

Thanks!  Charles

Those were the parts I'd selected, but wanted professional advice. That's the ones I'll order.

Thanks,

Glen