Ah, I didn´t know at all about inner-frames for klickies being available from DS...
Maybe it are the grey ones from the Surprise Figures? Other bodyparts from these figures are also sometimes available.
Btw;
You can repair loose arms buy closing the armpits on the frame of the klicky somewhat, so the arms can again be hold up firmly.
You could use a tool for that (pincers / pliers in English?). Personally, I bend the 2 sides of a frame-armpit somewhat back towards each other by pressing them against a hard flat surface, like a wooden table or a floor.
This method leaves some local marks on the frame though. Also, if the repaired figures get used much, the arms may loosen up again after a while.
Alternatively, not to damage the frame at all and to get a longlasting solution, you can narrow the armpits with small pieces of thin adhesive tape. This method just takes a little more time and precisionwork.
Loose legs, I repair them by pressing the "backlip" (just a word I use, I mean the part of the frame that fits behind a klicky´s bum) somewhat to the front. You have to be careful and press slowly, too fast/brute or too far and it may brake off. (such a failure happens occasionally).
The older and/or more brittle a frame is, the more careful you should to this.
Like with narrowing armpits by pressing, here too this leaves a pressmark on the part and if a klicky´s legs see much action it may loosen up again.
Here too, you can alternatively use (transparent) adhesive tape to get a more longlasting result.
Cut some small pieces of tape and attach it over the "backlip", especially over the side that will make contact with the legs. Use multiple layers (or somewhat thicker tape) if the legs were really loose. Instead of putting the tape on the (inner side of) the "backlip" of the frame, you can also put somewhat even smaller pieces of tape on the little "bumps" on the sides of the legs that the frame should hold. That makes these "bumps" a bit thicker, so they again will move tighter in the legholes of the frame.