Dang, simplex bar ends. Those are rarer than hens teeth.
Weird that it has Universal brake calipers and Mafac levers. Perhaps they needed a little shorter reach if the wheels are 27 x 1 1/4". Are they?
FWIW I had great fun fixing my PX10 last year, and it need a whole lot more than that one. Make sure to have fun instead of work!