Casio bring you a watch which comes with resin strap. Just swap out the batteries when the watch stops.
The Watch Hut
Mens Casio G-Steel Midsize Alarm Chronograph Radio Controlled Watch GST-W300-1AER - Black / Black
Watch Shop
Mens Casio 'G-Steel Midsize' Silver and Black Stainless Steel Tough solar Chronograph Radio-Controlled Watch - Black / Black