I will scrape members from target group with help of my @TGScraperBot.
I will provide you list with members in .txt format with parameters which you need: username, id, first name, last name. Members could be filtered by their activity: last 24 hours active, last week active and all members.
If you need custom scrape (members or admins only) with other filtering time interval - send PM.
Feel free to contact me anytime.