8th of October Frontline are releasing the LE60 with a Rover V8 and BEE with electric motor and 140mile range.
https://bicesterheritage.co.uk/news/new-mgbs-to-make-world-debut-at-the-scramblehttps://www.frontline-cars.co.uk/Not sure what they have done to the LE60 to make the track 10 inches wider but the car is only available as a GT probably because widening the Roadster is not an option. However under Bespoke options on the Frontline website they have a Roadster V8.
I guess they will still make 4 cylinder Mazda based cars as well.