Originally Posted by saddlesores

if you are concerned about mounting the rack to just one
eyelet, you can consider using both eyelets.

get a chunk of aluminum or steel stock, cut and shape to
fit the dropouts, drill a couple holes to match the two
dropout eyelets. then pick a suitable spot on the metal
stock for your rack mounting hole.

this was using a pair of aluminum supports from a scooter
shop junk bin. configuration of the dropouts made it
difficult to mount the rack. total cost a couple bucks
for bolts and washers and locknuts.

could prolly do something similar with a pair of stainless
steel mending plates from the home depot.