Retailers like TEMCo Industrial and Ferguson provide high-quality components and detailed selection guides.
You can find run capacitors through several types of retailers: buy run capacitor
You can use a capacitor with a voltage rating that is the same or higher than your original. If you have a 370V capacitor, a 440V replacement is acceptable and may actually last longer. buy run capacitor
Parts Town is useful for finding specific OEM parts for commercial or specialized equipment. Identification and Safety buy run capacitor
Ensure it is rated for your local grid, typically 50/60Hz . Where to Buy
Sites like Amazon offer a wide variety of "universal" and brand-specific options.