Unfortunately, Stages does not make a power meter that works with SRAM DUB road cranksets. We do however offer power meters that are compatible with SRAM Red/Force DUB cranksets such as the:
Quarq DZero DUB Power Meter
SRAM RED/Force AXS 107 BCD Power Meter Spider
SRAM RED/Force AXS 107 BCD Power Meter Spider