Lead generation for e-mail campaigns

Oathello is a young startup company that is building a platform to enable people to find, book and pay for witnessing and notary services on demand. We are looking for e-mail addresses of individuals in bodies and associations that represent companies in business sectors where witnessing and notarisations would be needed as a part of business life. Such sectors include - The aviation sector, specifically, aircraft leasing associations The medical sector, specifically, general practitioners associations, mental health practitioners / and consultant doctors. The financial services sector, including associations of taxation consultants and institutes of chartered / professional accountants. The general business sector, including institutes an associations of directors, professional business associations and associations of business The legal sector, including legal executives and commissioners for oaths, notaries public, solicitors and barristers-at-law. E-mail address are vital. Each group and subgroup of individuals would need to be broken down into separate lists, e-mail addresses accompanied by names, postal addresses and company or firm. The relevant countries for scraping this data are for the UK and Ireland.