Canon EF28-135mm IS USM Lens with Broken Mounting Ring

[mr.mike]

Hi,
Wondering if someone might know what model Canon lenses share the same rear bayonet mounting ring as the EF 28-135mm IS USM? The one on my lens is broken. Lens still works, but binds a bit when mounting. I see them for sale on Ebay, but nothing mentions the specific model I have. Looks like the actual model number is CY1-2180-000 but not 100% sure. Many similar variations sharing the same part numbers, but having slight overall differences. Looking forward to your responses.
Thank you,
Mike

Problem solved, bought a donor lens for parts.

 

[rayan008]

I have this lens bought it used from KEH for my Classic 5DMKII. I used it to shoot my nephew's 1st bday pictorial so far so good.

 

[Soocom1]

If your talking about the rear bayoneted mount, ANY canon AF EOS bayonet ring should work. EXCEPT the plastic rings.

At least that has been my experience.