I recently had an amber marker lens go missing on my 2015 Windsport 27K. I took a chance and found these ones for $6 on Amazon were an exact replacement. It is the whole assembly including the bulb, BTW. There also have the red assemblies. The lenses just snap in, but if you are removing a lens there is a screwdriver slot underneath to pop it loose.
Not sure if other models use this style of marker light.
Amazon Link:
Robot Check
Thor Forums
