I don't live near Sumter, nor do I know anyone who does, so I can't help with a list.
I would say that if you have contacts in the Sheriff's Office and they say it's a controlled document, then it's unlikely someone that has it is going to share it on a public forum. If someone with it isn't willing to share it on the down low, you're probably out of luck.
I can say that the 10-codes that are used by the SCHP, the 10-codes used by Spartanburg County, and the 10-codes used by Greenville County are all very different. While there may exist a list of standard 10-codes, there is absolutely no obligation for agencies to use those codes.
With a lot of listening, I bet you can pick most of them up based on context, but there will always be a few that you won't be able to figure out. Perhaps you'd have more luck asking your deputy friend what one or two specific codes mean rather than asking for an entire list.
Hope that helps.
Brian