The honest answer really is to buy a car with a manual, but if you really want to try this you'll probably want a Chrysler T355 5-speed transaxle...it's what the Caliber/Compass/Patriot use. You'll also need the shifter and linkage for it, the pedal assembly, and the manual version of the master cylinder (as the clutch uses the brake master). You'll probably have to reprogram/replace the PCM and maybe some other modules as not having a transmission control module will likely not be appreciated by your existing PCM. Not sure if the TIPM needs to be replaced as well. I hear the 5-speeds can be hard to source...FCA didn't make a whole lot of 'em.
If you decide you REALLY want to do this and need a donor car I may be able to help you out...my '10 Caliber 5-speed (daily driver for the last 11 years) runs like a champ but I live in the northeast and the appreciable body rust has me in the mindset that the time has come to finally replace her 😭. As such I'll probably be selling it in the not-too-distant future when I score a new ride and there's no way you'd be able to buy all of the needed parts for less than what a donor car costs.
If you decide you REALLY want to do this and need a donor car I may be able to help you out...my '10 Caliber 5-speed (daily driver for the last 11 years) runs like a champ but I live in the northeast and the appreciable body rust has me in the mindset that the time has come to finally replace her 😭. As such I'll probably be selling it in the not-too-distant future when I score a new ride and there's no way you'd be able to buy all of the needed parts for less than what a donor car costs.