Python Email Scraper from Exhibitor Pages

I need a Python professional who can create a web scraper for me. It should allow me to extract email addresses from the URL: https://www.siams.ch/Visit/List-of-Exhibitors or equivalent website / structure, specifically from each exhibitor's page (one level down).

Requirements:
- The extracted email addresses should be saved in an Excel file.
- I need the final output in a format that is a downloadable file.

Ideal Skills:
- Proficiency in Python and web scraping
- Experience with data extraction and Excel file handling
- Ability to create user-friendly downloadable files