[Gogar]

Do you want a real one?

I think authenticwatches.com has the easiest-to-navigate website. Looks like they have 18/16 leather straps for $295.

You can look on eBay and surely find one, I wouldn't be too afraid of jomashop and authentic watches.com if you're just buying a strap.

If you're not in a hurry you can probably wait on eBay and a real one will pop up for cheaper.