Thanks for the comments and suggestions. I think exploring possibilities with ABC is where I'm going to start.
I think you probably would like the ABC/Entertainment Network. 4:00 minutes on the hour... 2 minutes of news, a minute spot, another minute of news, which is optional. Also a 1:00 update followed by the spot at :57.
ABC/Direction used to offer the same newscast (without the sounder and different spots) as an option. They had another newscast for ABC/D that was two minutes fed at :50. They may have changed this... I'm not sure how the "ABC News Now" fits into the picture.