37146, 37153 may be your easiest options.
Other examples are 37128 and 37209 although I don't think either carried IS stags etc.
37128 was an RSH-built machine so had different cantrail grilles. 37209 also had lamp irons on noses.
Other LLB examples may be possible but these were perhaps ED machines IIRC (37175 etc.). 37183 was in LLB with the bufferbeam cowling.
The classic IS LLB engines 37260, 262, 263 did not have the same nose ends as the Heljan model, and also had the Halfords hi-intensity lights.
It's a minefield....