I know banggood has the evva has both 4500 and 5200 for sale Banggood's Daily Deals -8.24 Updated, Astrolux® EA04 37.99$+MATEMINCO FT02 18.83$+Astrolux® ED01 21.5$+Astrolux® EC07 70.99$
The keeppower is only available in 4500 26650 keeppower 4500mah haben wiederaufladbare Li-Ionsbatterie geschützt Sale - Banggood Deutschland sold out-arrival notice-arrival notice
Maybe check fasttech, not sure where else has them