who could fix stones to my wach, bec tey fel off?

i have storm wach just 4 two month, it has crystals around the glass and 3 of them i lost it somehow?! i need to fix it but i cant find them. to send it to storm company would cost me 40£ even if i have incurance for one year but it covers just tech brakedowns.im realy upset that even if they fix it stones will fell out anyway and it will cost me tomuch.maby somebody knows where i could make it cheaper? thanks