Snapped rear peg mount.

Afternoon guys,

took my daughter somewhere the other day and when I returned to collect her the rear footpeg was missing, I think it must have snapped when she was getting off and fully dropped off on my way home.

Any ideas where I could get a new subframe? I’ve tried the usual EBay etc and typically all years seem reasonably cheap except the 02-04 which I have, they seem to be rare and as such bloody expensive.
Also surely this is a weak point on these bikes as she is only about 6 stone so how the hell this happens is beyond me.

Thanks in advance.