Welcome To My World
Though our Ironrite 890 is rarely used it's in very good condition so won't be parting out anytime soon.
You'll want to take a look at the grease in the gear box and see if it wants changing as well.
Don't know if the "Ironrite man" is still is business as he seemed to have a decent stash of NIB parts. Other than that you're going to have to keep along your current path looking for spares from another unit.
While the small size and portable design of the 890 has much to recommend, really don't use it for much besides napkins, pillow slips and *very* small tablecloths. Both my larger Pfaff and Frigidare ironers have bigger rollers so larger jobs are over with quickly with less bother.
Congrats on your new find and hope you are able to get things up and running soon.
L.