As the Mets look to revamp their starting rotation after disappointingly missing the playoffs, they’re prepared to part with one of its current key cogs. Access the Mets beat like never before Join Post Sports+ for exciting subscriber-only features, including real-time texting with Mike Puma about the inside buzz on the Mets. Try it free Right-hander Kodai Senga is “extremely available,” ESPN’s Jeff Passan reported Tuesday, adding that multiple executives anticipate the Mets trading the 32-year-