The only play pens I've seen are tiny, cage-like things, but as others have said, t'internet is the place to find stuff.
Coincidentally, I've just responded to another topic about leg-irons in China.
Give'em free rein and let grandma take care of'em seems to be the traditional approach.
But I do have safety concerns about that.
Safety pins - never seen one here, though they're almost certainly manufactured here.
If your friend is using cloth nappies (diapers) then the thing to do is just tuck it in rather than pin it as we do in the west. It works.