I have had good luck with these throw bags from H20 rescue gear. We have utilized them for each member on a fire department swift water rescue team. It is a little bulkier than the NRS pro, but it is 25' more rope. In my opinion I can throw the H20 better. They also have small gear pouches available that work well for pulleys and prussiks. When rowing my cat with a high back seat, I just slide the throw bag to the side and have no issues. I really like having a bag available with me, in case of out of boat experiences or helping others.
Sharpshooter Throw Bag
Sharpshooter Throw Bag