Dometic SMEV. Available at http://www.panther-rvproducts.com
There are different configs available including just sinks.
Not cheap. If comparing prices, make sure it has all the pieces - glass lid, faucet, etc.
FYI - I have an account with Panther and can save forum members about 7% if they order through me. PM me if interested or any questions.
Beastie 3: 2002 7.3 EB Cargo: Agile TTB, CCV Mid Top, Custom Walk Through, Lots of stuff added. BlingMyRig.com
I'm a big fan of the SMEV combos but haven't bought one yet. I've been looking at them for years. Ray, you're always a good source of discounts. Careful, your friends here may start costing you some time and hassle.
This one was actually made by a company called Can. I found it on Ebay UK being sold by a van upfitter there. I looked at the SMEV units but they were all slightly too big. As you can see from that photo I had zero extra room to spare!