Web Scraping & Data Mining to find emails for eDM campaigns

Hi! My name is Steve and I am the MD at Abacus. We are looking for someone with relevant experience to help us to source good quality email data from online sources eg LinkedIn, Sales Navigator, online directories, etc. I can explain more when we speak, but I would like an idea of your previous experience at this sort of thing, how you would go about doing it, the cost per record etc. We have two lists at our disposal we wish to expand (one with 1000+ companies where we have one good named contact, from which we want to find 1000-3000 additional senior contacts in total from these companies (so 1 to 3 at each); the other list has 400 companies with one good quality names individual and we want 400-1200 more contacts here (again, 1 to 3 more contacts at each)) and a third list we want to create from an online directory we have found of about 200 companies, where we want 1000 records in total. Therefore, in total we are looking at 2500-5000 additional emails for this project in total. I hope that helps to give you a good idea of the scope and scale of work involved. When making a decision on who to work with, we will prioritise people based in the UK who I feel most closely reflect Abacus values in terms of professionalism, personality, passion, knowledge etc. Thanks for reading this far, and I look forward to hearing from you.