There are 2 pigtails on a 12m. they are 16cm and 8cm both loop to loop connections. Any kite shop with a workshop should be able to manufacture out of 3mm dynema or you should be able to order from your local north dealer
Product is 44500-8647 for left (red), 44500-8648 for right (grey) and pack should include both pigtails.
The 14.5 is a different length, 18.5 and 9 cm and as my wife tells me size does matter
Toddy