Sorry Ray, this not the sequence of events at all.
When Meccano went bust the tools went to Triang who were approached by George Wrenn who asked if he could produce a small production of the Castle, 8F and 4MT, this was agreed. Much later Dapol to over the Tooling sometime in the 1990s.
As for the missing tools I suspect that many stayed at Margate, indeed the Hornby stations were reissued in new colours to match Triang's own buildings.
Richard