No one is currently making these springs, to my knowledge. There was a member here who made some, and I contacted him a few months ago to order 10, but never heard back. Links for these bracelets sometimes come up on eBay, but you'd have to buy several to get the 6-7 springs you need for that bracelet. If you find some springs, PM me and I can install them for the price of postage.
I used them to restore an Eberhard bracelet that had broken springs. Both bracelets use the same spring loaded links. Seems unconventional but works pretty well...