It seems, there's the offbrand Xpower, which is a clone of the datavac with a 500watt motor.
There's a pistol version with 500watt, but one would suspect this produces less air pressure given the short chamber after the motor.
There's a few watering pot version which are smaller.
The only brushless is an 80watt version. Though, this is probably not super important for this type of thing, as you wouldn't run it continuous for all that long.
The cordless iterations, a few are brushless, but these definitely can't match 500watts. They use between 1 to 3 18650s depending on the thickness of their grips.