In a message dated 8/23/2016 2:36:06 P.M. Eastern Daylight Time,
markmcculley@GMAIL.COM writes:

Anyone  know of a source for the rubber washers specified as 8X25X4,5 in
ETKA?  These are used between the luggage rack and mounting brackets, seem
to be  no longer available.

any hardware store or homedepot lowes