Looking for Volt and Bolt Lease Quotes

Hi, new to the forum but so impressed with the knowledge on here; mind blown!

I am looking for some quotes from providers for Chevy Bolt and Volt (size vs range is an annoying compromise!):

24 mo
UK Military if that matters?
Costco member.
San Diego based.
Question - Can a lease be extended by a few months towards the end? My military posting ends in Summer 2019 but no confirmed date yet!
Credit Score - 720+

Many thanks for you assistance and offers.