Download the correct S60v1 firmware pack (MCU, PPM, and CNT files) matching your exact phone model code (found on the sticker under the battery).
Distributing copyrighted firmware files (ROMs) without permission is generally considered a violation of copyright law. The EKA2L1 project explicitly states that you should find your own ROM, and they provide a wiki on how to dump it from a device you own. The safest and most legally sound approach is to extract the ROM from a physical handset that you own. s60v1 rom download
Nokia released official developer SDKs containing full x86-compiled system ROMs. These run natively inside Virtual PCs or legacy Windows environments to simulate the exact S60v1 user interface. Download the correct S60v1 firmware pack (MCU, PPM,