Vinyl window glazing

A contractor from Addis, La. says:
The windows were installed in 1976. They are Mayfield or Mayfair. I need black vinyl window glazing, about 100?.
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Paul from SWISCO responded:

The part you are showing us is for a Mayfair Classic Series Window. We offer a substitute glazing bead for this part, our 55-002. Take a look. We have known customers who have this type of window been able to use this part as an alternative. 

A contractor from Addis, La. says:
Thanks for your help Paul. I'll give it a try.
A contractor from Addis, La. says:
Paul I tried this part and it doesn't work. It doesn't lock or seal in place. I cost me $30.00 for one 6' piece. It's totally different from what I have. I have attached another photo of the end of the glazing. Also, how can I return this piece for credit.
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Paul from SWISCO responded:

I apologize for the inconvenience. You can see our return policy here. For future reference, I highly recommend looking over the dimensions and photos on our site to confirm our hardware matches yours.

As for this new picture, our 55-151 may be a better match. Take a look and see what you think.

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