Maybe, if they're reserved as unassignable (due to being an inappropriate value for professional, business puposes), then perhaps it's open season on those.
An alternative would be to find one that has been assigned to a now defunct company. Then you'd only have to worry about historical devices and if you are lucky you could come up with a list of those PIDs and exclude them.
I think 0xF055 has circulated too much now (slashdot, hack a day, maker: etc.) So if we there should be squatting it better be on 0xF055. Let's just destroy the strict minimum to achieve our goal (having a unique VID+PID for our proprietary drivers to find the corresponding gadget on the bus).
Maybe, if they're reserved as unassignable (due to being an inappropriate value for professional, business puposes), then perhaps it's open season on those.