Since many of the original parts were no longer available, Jimmy considered having them made. As tail light bezels had deteriorated on virtually all Metropolitans, Jimmy decided to start with those. In 1975, he located the manufacturer in England that had made the original tail light bezels. The company found the old molds, but the minimum number they would run was 5,000. Jimmy took a financial gamble, having no idea how big the demand would be, and placed the order. That was the turning point... what had been a hobby blossomed into a business.

The Valentines began having parts manufactured, which involved the expensive process of creating new molds and dies. They also had many parts remade by the original manufacturers. Cartons of car parts and accessories were now stacking up in the lobby and hallways of the recording studios. After 25 years in the recording business, it was phased out as Jimmy and Eve spent more and more time with the Metropolitan venture.

Over the next several years, Jimmy developed a complete inventory of Metropolitan parts, reaching the goal of being able to offer a replacement part for every component of the car.

Along the way, the Valentines purchased a group of buildings to house the vast inventory of parts. Further expanding the business, a full-service garage was added for repairing and restoring Metropolitans, as well as for conducting research and development on new parts production.