Seeking terminal strip with 1/2" spaces for large spade connectors

My speakers (Vandersteen 3A) use terminal strips with screw bindings for the speaker connections, and I love how tight and secure they are. I'd like to use the same strips for my amp project, but I can't find any that are spec'd for a 1/2" spade. I've posted on the Vandersteen forums, but so far no luck. Does anyone know where I can get something like this? Mouser doesn't even measure the channel width.