mtgldr

New to Mustangs and this Forum, did a search but I'm not finding an answer.

I have a 2010 and the stock rear bar is 20mm, I would like to upgrade to a 24mm bar and found the part number CR33-5A771A was for a 24mm 2011+ GT bar however, I can't seem to find this part number anywhere except in posts. I emailed a Ford dealer and they said they didn't show that part number is their system. I'm a little new to the Ford numbering system and maybe I'm missing a digit or letter.

Anyone know what I'm not doing correctly to get this to come up in Ford's system?

Does a 2011 - 2013 rear bar with all associated hardware bolt right up to a 2010? My understanding is that 2011-2013 cars have a 24mm bar stock.

I've already installed Boss 302 springs, D-Spec shocks and I would like to upgrade the rear bar. I don't plan to track the car but maybe once or twice a year for fun and don't plan to stagger the wheels so I figure staying with a stock 24mm bar would be a safe upgrade. Plus I'm hoping I can find a takeoff from someone for a great price.

Any help would be appreciated.