glazing beads for lawson series SH-7500 windows

Thanks for posting. The 55-204 Vinyl Glazing Bead has been associated with your window in the past. I can't be sure without seeing the 'end profile' of your old glazing, but if it looks anything like what is shown in this old discussion here, I think this might work for you. Compare the dimensions with your old glazing bead and let me know what you think.

Profile view of 55-204