Time to fabricate, with the help of a person with a sewing machine.

was a piece 'helmuffs' a little triangle of fleece and nylon and a strip of webbing
that stayed in place by the helmet straps and covered your ears .
think they were a short lived production.

there is also the traditional cool weather cycling cap,
added some stretch jersey to cover back of neck and top half~3/4 of the ears.