Does Ashcroft offer a pressure switch with a DPDT switch?

No, but in the A, B, F, G, L, and P series you can get a unit that has 2 SPDT switches that actuate at the same setpoint to simulate a DPDT switch. SPDT – Form C contact – single pole double throw, one contact which flips over, switching the input from Normally Closed to Normally Open. DPDT – 2 Form C contacts – double pole double throw, the same but two ganged together.