Yes, there is a model made by Swanstone that is not a perfect rectangle but is the largest I have seen of it's type to fit into a 24" cabinet. It is 9 inches deep, but if you use the undermount style that would add extra depth due to the countertop. Swanstone makes a lot of solid surface stuff, but this is a line of sinks made with quartz that is very much like the Silgranit. They also make it as a 'drop in' model, but I linked to the undermount version.

Here is a link that might be useful: Swanstone

Ah, the drop in picture is better, so I'll link to that as well.

Here is a link that might be useful: 24