Almost all of the WDW restaurants accept PS. You just need to call the main Disney Dining reseravtions' number - 407-934-3463
There are just a few restaurants (mostly the non-Disney owned) that don't take PS or you have to call directly (ie. ESPN). But, you can make PS with this number for most WDW restaurants, S/D restaurants and most of the DTD restaurants. They can tell you the numbers to call for the restaurants they cannot schedule PS at or if they take them at all.
I believe both restaurants you mentioned can be made thru Disney Dining (at one time the DTD location of RF didn't take PS, but that may have changed) and it's not too late to make them. You may be limited on available times depending on when you are going.