Throwing around the idea of keeping the original hand guards on my new DPMS oracle. Is there a sling attachment that will go on to them so I can attach a sling?

Boonie Pcker has a couple of different options that would work for you.

Boonie Packer

The QC16 and the Silent Front Sling Mount(made with kevlat webbibg) both work very well with stock handgurads. The pricing also includes shipping by the way.
First class slings at very reasonable prices.

The problem is going to be that the Oracle lacks the conventional A-frame front sight base, which most sling adapters use as an attachment point. Does your Oracle have a bottom rail on the gas block?
One thing that might work, there is an adapter made by an outfit I believe is called Blue Force. It is a cable choker with a sling mount on the end. This might work: Universal Wire Loop
You would have to choke the area in between the handguard cap and the block rail. If a significant physical constriction does not exist between these two parts, I would tend to question the security of this option.
Assuming you have a gas block mounted front iron sight: does your front sight use up all of the available rail space? If not, one of these or thiscould possibly be mounted aft of the front sight IF it does not interfere with any folding action.
Another option would be to have a gunsmith drill, tap, & attach an alternate mount (i. e. stud, QD cup, rail, etc.) to an appropriate area on the gas block. This could be cost prohibitive, meaning replacement of the stock gas block with a different unit such as this might be more cost effective.
There are many variables & solutions.
Please offer your feedback.

Impact weapons components carries one...

I like them as a company.. top notch.

http://store.impactweaponscomponents.com/tmhkstslmo.html