I'm trying to find a replacement for a capacitor . The capacitor is a CBB1 250VAC, 50/60 Hz 70uf +- 5% . Max Temp 70 C. It also has E158584 marked on the side. The capacitor is a round and gray color with 2 black wires. Where can I buy it?

Your best bet will be at a supply house like Grainger's or at an HVAC parts house (these vary by location). Take it with you.

Good luck,
WallyH