1: Take your existing rug.
2: Buy a remnant 2x4 or a 4x4, about 1' in length.
3: Buy two bolts that will go from the bottom of the rug, through the wood, and nuts to top them off.
4: Buy washers to put between the heads of the bolts and the rug and the wood and the nuts.
5: Drill accordingly and install.
It's like any production drum rug, only cheaper. If you are worried about marring anything, buy felt or thick fabric and wrap the wood in it.
You are gonna have to be careful about the bolt heads on the floors under the rug, if that's an issue. You could always cap them with rubber or soft plastic.