Bandai have confirmed their next Star Wars 1/12 figure kit as the Astromech R4-M9. This release is essentially a recolouring of the previous R4-I9 droid and will be released in September 2019. As with all the Bandai kits, these will have to be imported into UK and expect to pay around £20 - £25 per kit.
R4-M9 appeared in Star Wars A New Hope, he was an Imperial Astromech stationed aboard the Tantive IV when it was attacked and disabled in orbit around Tatooine.