Data Collection: German Lettershops

I need to collect the contact details of all available lettershops in Germany. To be specific, I require their email address, physical address, and website.

Key Details:
- The final deliverable should be a spreadsheet.
- Experience in data scraping and web research is a must.

Your proposal should detail similar past experiences. Please ensure to provide examples of previous data collection tasks.

It means websites which offer services like this website
https://www.lettershop.de/