DKLM now offers their new 1/16 Churchill kit. Clark Model is due to release a Cromwell mid-summer 2019 & are to follow with a Crusader Mk III; also considering a Centurion & possibly a Comet.
DKLM/OKMO Churchill Mk. VII
https://www.dklmrc.com/product/ccmk7
https://www.rctankwarfare.co.uk/forums/viewtopic.php?f=1&t=26015
Clark Model Cromwell Mk. IV
https://www.facebook.com/CLARK-MODEL-313209919787/
Another option not mentioned would be to kit bash what's available if you want something different. I'm currently backdating my metal Mato M4A3 into an earlier M4A1 using Nick Aguilar's excellent cast hull kit. It will be done up in British livery for El Alamein '42.