where can one find intercalated discs and what is their basic function

You won’t find intercalated discs available for purchase because they’re not a physical object or technology. Instead, intercalated discs are specialized structures found within living tissue.

Specifically, intercalated discs are junctions between cells in the heart muscle, also known as cardiac muscle. Their main function is to facilitate the coordinated contraction of heart muscle cells, allowing the heart to beat efficiently as a pump.