does anyone know where i can get a neckstrap on it's own(no martingale etc) to fit a 16.2hh cob? all saddleries i've been to either dont do them or only have tiny pony ones. my friend is learning to ride on a biggie and needs something to hold onto for that bit of extra security. i've been advised to use a stirrup leather but they're too wide really. it's very frustrating!!! surely something so simple shouldn't be so hard to get hold of?!?!?!?!?!?!?