How tall is she ? I have a 13" 95 kona hahanna for the other half .
The trouble with nice smaller frames is the midgets out there have a habit of paying a fair wedge for them as there seems to be less of them compared to larger ones .
erm roughly 160cm i reckon. yeah they arent as common which is a shame, probably LOTS of ill fitted bikes out there beacuse the smaller sizes arent as available at a competitive price
One of my TT frames had track ends with a brazed on hanger for a rear mech. Apart from a bit of fiddling to get the wheel in (removing the q/r skewer and fitting it when the wheel was in), there were no problems.
Many years ago I did run a winter on an old track frame with a gear attached with a normal screwed on hanger. Bit of a 'faff' to get the wheel out especially with mudguards but it did work.