The 120C is the matching center, looks like there are some on Amazon.
The 130s would just sit on the stand. Use some Blue Tak to stick them to the base if you want more stability, but they should be fine assuming you have a decent stand. Look into something metal, or one that can be filled with a weighted material.
Samsung PN60F5300 | Denon DBP-1611 | Roku 3
Denon AVR-1713 | EMP E55Ti | EMP E56Ci | EMP E5Bi | BIC F-12
Topping TP23 | NHT SuperZero 2.0 | Velodyne DEQ-8R