You'll need to measure the width of one of the remaining ones. Winnebago used 2
different lights, but kept the same part number. If it's right at 1" wide, you
can use the ones from Harbor Freight, item#98933. There are 12 in the package
and a wire has to be added to use the base, but the lens fits fine. If it's about 1.25" wide, you can order
one from http://www.schoolbuspartsco.com
It's a KD 500-2.