Is there any where I can find a chain ring that is not hollow on the inside similar to the poorly drawn image I made?

I’ve never seen one without some sort of center hole, but if two small holes are OK, old BMX chainrings are often close to that. Haro 8 Ball or “eye ball” or my personal favorite, the Tioga or Peregrine Compact Disc style. If you do go vintage bmx, be prepared, prices for relatively simple things can be eye opening.

Here’s a link to a nearly solid stamped steel one for low rider bikes.

https://www.ebay.com/itm/195915796396?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=pLCAy8-yQBy&sssrc=4429486&ssuid=F7ETGWvqTsG&var=&widget_ver=artemis&media=COPY

It could be made completely solid in about 20 minutes with a welder.