Can't recommend a site but unless it's specifically an IWC brand name you want to be wearing if you look up homage watches of the model you want you might find something similar
I love watches and I'm always wearing one. I've got a Garmin Forerunner 245 that I wear for sport, then I rotate between a Tudor Heritage Ranger, an Omega Seamaster, and when I've replaced the crystal a Tudor Chronograph that I built out of old parts sourced off ebay and watch forums and even a...