VC Studio Inc. If they are mass produced you could take this picture to your local high end plumbing showroom and they should be able to find out for you.
If you are looking for something more personal then you could have these hand crafted in concrete. We are willing to ship anywhere but you can most likely find a skilled concrete artisan in your area. I'm always open for questions and will help when I can.

kelliepk Thanks for the response! How much would it cost to custom make one of these? We are working with an architect/interior designer/plumber and no one can find it. Where are you located? How much is shipping? Thank you greatly for the help.

VC Studio Inc. Not sure of the exact size of the sinks in the photo. We have a 16" diameter mold that would work well for this. It would be best to build the lip to at least 3/4" which would give you a 17.5" diameter (It can be as thick as you like). The outside would be textured by hand/tool to simulate what we see in the photo. We should be able to create a custom sink like this for you for $750. We are located near Seattle WA. I would estimate shipping to Los Angeles at $65 for one $90 for two, to New York $80 for one $110 for two (that would include boxing or crating as needed). Not sure where you are but this can give you an idea. I would love to create this for you it looks like fun! Give me a call or email if you are interested (www.vcstudioinc.com has all contact info).

kelliepk How long would it take to build one sink? We may be interested, and may be in Seattle in that timeframe.

VC Studio Inc. With the current schedule it could probably be done in 2-3 weeks. I'm headed to a convention tomorrow (so I won't be checking on emails and messages until the evening). Next week the jig could be built, the molds set up, & the sink cast. The concrete needs to cure and then dry out before sealers can be applied. This could take 5-7 days depending on heat and humidity. That would put us at approximately two weeks from tomorrow at the earliest. It isn't always this quick but one big project just wrapped with the install Tuesday and we have a brief breather before we ramp up for the next one. I look forward to hearing from you.