I would shop that cost with different Ford dealers, as some dealers will work at cost plus $100 up to cost plus Infiniti. I had been quoted as much as $3200 for a 4yr/24K policy that I ended up getting for approximately $2200. Can’t remember the exact number off the top of my head.
Langway Toyota, Middletown RI (Newport RI) has 1287 on their showroom floor, along with a few other low mile/high priced Mustangs (1965, 1986 SVO, 2013 Boss LS, 2014 GT500 'Vert, 2015 GT 50th)
https://www.langwaytoyotaofnewport.com/used-inventory/index.htm?make=Ford
Colonial Ford, Plymouth MA...
wheel-size.com use their sizing calculator and play around with the wheel/tire combo you want to try. Plug in you original specs for an accurate comparable...