need a arch snap in bead in white for my circular window

Thanks for writing in! I'm sorry to say that we do not sell any glazing bead made in an arch like shape. Although, it does appear that your glazing was cut into pieces and could potentially have been bent to fit the shape of the window. Your glazing bead closely resembles our 55-192. Take a look and see what you think.

Profile view of 55-192