Where to find service manuals

The only thing to do is get a genuine manual, contact your dealer parts for availability. Problem these days is that there is so much information dealers do not use paper manuals anymore. It is all manufacture based online tech information which is not open to public access. Online search may locate specific details, but I doubt that you will get a full manual this way.

Most mechanics subscribe to on line data base platforms, these are professional based subscriptions and not cheap such as in the USA and others like AutoData. There are a few out there but they do cost a fair bit to subscribe. Cheaper versions are around but you get what you pay for, and in business one mistake can be disastrous. I have never entertained cheaper versions, for me, it is just not worth the risk of trying to save a few dollars.

AlldataDIY and Mitchell both offer one year subscriptions for single vehicle use for around $30.00. That gets you access to the same data many shops use.
For a true full parts catalog you need the Chrysler CD's. They are not available to the general public.

https://www.alldatadiy.com - $29.95.
https://www.eautorepair.net - $29.95 (This is Mitchell1/ProDemandd DIY site).
Both offer money back if you go in and do not find the info you want.

Or you can subscribe directly to Mopars site (please sit down before you look at the yearly price!)
https://www.techauthority.com/en-us/products/?category=1