snap in trim/glazing?

A quick learner from OKLAHOMA says:
Need to replace this 1980's trim w/new trim. Old trim was thrown away by mistake.Looks a lot like 55-202, but is not quite 1/2" across top down to the to small channel.
Thanks for your help!
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Tom from SWISCO responded:

We have a few different kinds of glazing bead that look similar to this. Our 55-202 is one possibility, but we also have others like the 55-016, 55-030, 55-196, or even the 55-212. In order to identify the best replacement, we'll need more precise dimensions.

I would start by looking at the dimensions we show for the 55-202 and giving me the corresponding measurements on your own part. Please be as precise as possible.

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