Is there such a thing as an Army OCS class ring?

Yes

Yes there is, contact an major class ring manufacturer and you'll be able to purchase one. Be sure to specific OCS Fort Ben or OCS State National Guard because they might have a State National Guard option i.e. Indiana Military Academy.
Here are a few links to help you out
Herff Jones does rings for State Specific Military academy officer candidate school and may do one for Federal OCS as well. Herff Jones has some good options.
https://collegerings.herffjones.com/index.cfm?event=getCategories
For OCS Fort Ben contact the email on this link
http://www.balfour.com/military/rings
Also reach out to the OCS Alumni Org, they might have an option for you
https://www.ocsalumni.org/

We had them also. Mine was stolen in Vietnam which was a surprise as I didn't think that it had any value, either spiritual or material.

We're not ring knockers. Even a female OCS officer has balls - but no rings!

You can get rings made as a class gift. Our class did challenge coins and enscribed wooden boxes.

No gentlemen. It wasn't a question of personal interest. In my civilian occupation I interviewed a witness today that was wearing such. I've never seen one, nor heard of such.... Just curious. It was (honestly) a sort of cheep looking ring. I didn't question the ring because it had no bearing in my purpose.

Seems like I had one in 1967 and I sold it to buy our oldest son a Moped. It didn't have class number or date on it.

For those who think less of such a ring, consider this: OCS grads from State Military Academies commit to a 14 month course. Graduation rates run less than 50 to 60 percent of those who begin. It is earned. Kindly omit any unfounded remarks about weekends only. Our academy required community involvement and work on your graduation thesis. A ring? Why not. As a state graduate I served on active duty as a commander during a period of war. Would I wear such a ring? Probably not. I earned my commission. Enough said

No. I just graduated August 2016. They do a class shirt and things like mugs, coins, etc. However, the exact details change from class to class as you're student leadership will decide how the class dues are split up and what they pay for.

Why not? I felt like getting my gold bars was enough, but if you want more bling, go for it!