Sponge for HP41c standard case

Sponge for the standard HP41c vinyl case. The original cases were designed to carry the calculator and card reader together. However, as these were sold separately, the case was too big for the calculator alone. HP supplied the case with a sponge within the lower part of the case to act as padding. These sponges may have been lost or deteriorated over time, so we have made a replacement with the right dimensions.