Harley666

There is an option for this in TT 120 from Lincoln locos.

https://lincoln-loco.co.uk/class-55-deltic/ 

I think the Hornby class 50 will be ok depending on how long the actual block is, the class 50 does not have nose ends like the the 55 but the length and bogies are the same, if you can get away with using the Hornby class 50 chassis then you would need to do a battery box to clip on the chassis 

Glad I joined and have seen the schedule

most of the items I am interested in, are not due for release until next year which allows more cash to build my layout this year.

I joined the team last autumn and have attached photos of  some loco's that I have done.

I will be doing 10000 - 01 soon. now that there are decent 3D prints available which include the as built and later modified design.

Gareth