Thanks Joe --
That sure looks like what's shown in the owners manual. I'll get an email out to her. And, yes it serves as the needle stop as well.
As far as fabricating a new cover disk, I want it to look as original as possible and lack the tools and skills needed to fabricate something like that. It must be a common problem with these machines as I have seen a couple others for sale missing the same cover.
Thanks for the feedback and lead.
Noel