I purchased engagement ring from Mappis in 1983.Descripition-C110 Number002741.This was a 3 ring set.In 1987 Purchased the wedding band Sku508796/Tracer28397.I want to get the third ring but Mappins says they were taken over by an Americian firm and they can''t obtain this ring.Am I being told the truth?Say they don''t have the books with this ring in them anymore.Does anyone have ideas on how to obtain this ring?