Whew, I should have used the term "ring assembly" The parts book shows that Guzzi used a stack of 6 separate pieces to accomplish the job. They are all 03-10 followed by 19-00, 35-00, 24-00, 22-00, 16-00, and 17-20. each is a single part. the 5 little screws are part # 03-10-32-00. If a used one is located, & the damn screws come out, the whole assembly will lift out of the tank mouth, can be dropped into a padded envelope from the post office & mailed out to me. I can paypal or send a check.
Thanks,
Ron