Current sense magnetics with critical/boundary conduction PFC chips
Most of the BCM controllers out there expect a voltage input from the supplemental PFC choke winding to tell it when to start the next cycle. You could somewhat reproduce this signal with a current transformer between the inductor and the boost diode. Rectify the secondary side signal and apply it to the control pin, and see what happens.

That being said, you probably should consider spinning your own magnetics for this powertrain. That way you know exactly what you're getting and won't end up paying extra for some feature or capability you don't need. The design process is fairly straightforward as well, especially if you design with distributed-gap toroidal inductor cores (just add turns!)