Custom Cars help

[Dupcio553]

Hello guys, I opened a server for friends just for fun in RPG mode. 

We decided to somehow add cars to custom IDs to have more cars available on the server.

We use this script https://community.multitheftauto.com/index.php?p=resources&s=details&id=18598  to add these custom IDs.

 

And now the question is, how can we make cars with custom IDs for private cars? We also using this package:

https://mega.nz/file/7GoSnYgA#0ScDOge3vTYfF8c59NLroGrAWOhvgP0l23v7JaQvDOw 

We want to upload some of these cars with Custom ID to the server. 

I don't know how we can give them to a car dealer  so that they can be purchased and kept as private ones.

 

Thank you very much for all your help :D