Glazing Bead for 1985 Mobile Home

A handy person from Marinette, wi says:
Hello,
I'm replacing my father's broken window panes. This is the vinyl/plastic glazing that was on there. The frames are aluminum and the panes are exterior. I'm not finding anything like it. Can I use something else more up to date? Also I can't seem to find information on the difference between a spline and glazing channel.
Thank you,
Margaret
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Bob from SWISCO responded:

See our 55-193 Glazing Bead. Look over the end profile dimensions and see if you think this matches what you need. 

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Profile view of 55-193
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