I've had really good luck with the
El Mustee 24"x36" mop sink. I had to do a special order from Home Depot, but they tacked it onto their "shop order" for other El Mustee products and I saved the extra shipping charge. The sink was ~300 - but is really solid.
I installed mine on an elevated base to make it easier to clean heavy stuff - like dogs and kettles. If I had it to do again, I'd have made triangle frames on the end and left the middle open - I'm always standing on the 2x4 to get closer to the sink. The backerboard is ubercheap melamine. It sucks as a base for the sink (scratches and opens up), but rocks on the walls. I'm moving the sink this spring to make way for trench drains in the garage and will use tile for the base then.
