The phrase "ample store" is correct and usable in written English.
It can be used to describe a sufficient or abundant supply of something, often in the context of resources or information.
Example: "The library has an ample store of books on various subjects, making it a valuable resource for students."
Alternatives: "abundant supply" or "plentiful collection".
Urquhart learned that there were ample stores of U.S. helmet liners.
The astonishing magic of controlled combustion, facilitated by Earth's just-right atmosphere and ample stores of fuels, has allowed humans to transform from scattered gatherers into a gathering global force.
Density measurements suggest there could be ample stores of water-ice on Ceres.
But with ample stores currently on board, the more pressing concern will be the status of the Progress freighter's launch vehicle - the Soyuz-U.
Babies have ample stores of brown fat at birth as a defense against the cold, but it mostly disappears, as adults have very little of this calorie-burning tissue.
Going on board with his prize crew, Tom surveyed the ship with a critical eye; he checked to make sure that he had ample stores and water on board.
Qaddafi's ample stores of weapons have been raided, with many of them ending up in the hands of terrorist groups that operate in neighboring Mali and elsewhere in North Africa.
The new health centre, built with UNICEF support, has a large open area where mothers and midwives can gather, as well as an ample store-room and a separate space where women and children can be examined.
Second, because it restricts assembly to a small region, there is ample memory to store complicated information about the reads and their relationships.
A good location, a rich store of natural resources, productive soils, cheap energy, and ample transportation facilities have made Ohio one of the great industrial states.
