Want to Buy Need replacement Saunders Masters Easel knob assembly

Sadly, a Saunders Masters easel that came to me through the mail suffered damage in transit and I'm trying to repair it.

One of the knob assemblies that adjusts the blade position has seized (bent washer inside). I'm looking for a replacement.

If you have a busted Saunders Master easel and you'd be willing to sell/share this part with me, please let me know. Happy to pay a reasonable cost and shipping charges.

Here's a picture of the part I need to replace. Having a replacement knob would be a bonus, but not strictly required to get this working again.