take an old one to NAPA, they should be able to come up w/ somethin you can cut down - also try marine stores, as the marine wipers are quite similar to our older styles
"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir "When we tug a single thing on an old truck, we find it falls off" ~ me Some TF series details & TF heater pics