I;m not into 1/sth scale (gas) nowhere to run. You have a couple of options to find info. Amazing Hobbies On Wellington, (Peter) is the owner can probably put you in touch with guys in London who run 1/5th. The others are FaceBook groups.
https://www.facebook.com/groups/1611391932408041/
https://www.facebook.com/groups/700843283320994/
That's the best I can do for you I hope it helps.