3" iron clean out looking for plugs?

[930dreamer]

My two clean outs have no usable threads, I was told to use 2-1/2" Oatey type plug but can't find one. Will that size work, I did find these but at $43 each! Can you see the mini baseball bat stuck in there?

 

[Reach4]

https://www.supplyhouse.com/Matco-Norca-LFP250-2-1-2-Lead-Fit-All-Plug
https://s3.amazonaws.com/s3.supplyhouse.com/product_files/LFP250-submittal.pdf