Well that contradicts references to 34 mm that have been tossed around. Do you have a 90520-39022 in the parts pile. The part number infers an ID of 39mm.
After digging around it looks like the 90520-39022 is also too large. What are the exact measurements on the existing ring? I asked that question a few times 9 years ago and again a couple years ago and nobody replied.