Python Web Scraping for Mutual Fund NAV

I need a Python web scraping program to save historical NAV (Net Asset Value) of various mutual funds from the AMFI India website in excel format and save these files in a folder.

Website link:
https://www.amfiindia.com/net-asset-value/nav-history

Webscraping programme should be written in such a way that it is not blocked by the website.


Requirements:
- Name of all mutual fund name and save in excel file so that if I want to select only few can do this.
- Scrape NAV and Date for each mutual fund.
- Data should be saved in Excel files.
- Each fund's data should be in a separate excel file, named after the fund.
- Insert placeholder values for any missing or unavailable data.

Ideal Skills:
- Proficiency in Python
- Experience with web scraping
- Familiarity with handling Excel files in Python (e.g., using Pandas)
- Attention to detail and good error handling

Please ensure the final output is editable and well-structured.