Is there a source for a W115 rear bench and back seat pad for my 1974 240D? If no pads are available, do you have a recommendation for the type of foam to use for the seats? There is a guy on YouTube who has replaced the pads on his seats with memory foam. I am wondering if the memory foam toppers at Costco would be a reasonable substitute if the original horse hair pads are not available?

Please help and thanks,

Dave