Hello Aspirant

There are no authentic sites that can provide you with ACC exam paper.There are many other websites that have previous year question paper,Modal paper and Sample paper,You can refer that sites.You can also have a look at the official website if they can provide you with the paper

You can also refer to this book for sample paper

https://www.flipkart.com/practice-paper-set-a-c-c-exam/p/itme6gc4bytfywhg

Regards!