You can try the internet. Not difficult I found the following :- Sat Nav for 2013 Cruze estate - Google Search
Unclear what you mean by 'factory sat nav'. Are you replacing the original defunct unit? New Original equipment is like hens teeth and it is questionable what update support you'll have even if you find one since Chevrolet withdrew support from UK & European markets in 2015. You'll probably be better to explore the internet or visit you local automotive multimedia specialist for something suitable.
I've based this reply on the belief that you are UK based (The Forum system believes you might be). Although you have been a member since you joined in 2018 you never completed your World location or vehicle details in the appropriate sections.
Helpful information here:- Helpful Guidance Using the Forum
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