The Collett coaches were the final coach development by Palitoy before the drawing office was closed down in 1983 and only one batch of each livery was sold under the Mainline Railways name. It seems that there were none amongst the residue stock bought by Dapol when the Mainline warehouse was cleared out. This was because the original batches had completely sold out and Palitoy were about to reorder when the decision to closedown the operation came through.

Kader used the tooling to produce some Collett coaches for Replica Railways in 1987 and 1988. However, before doing so, Replica paid to have the tooling modified, as there was some distortion of the mouldings due to poor mould design, and the height of the windows had to be changed. The Replica and Bachmann Colletts are therefore slightly different from the original Mainline ones.