Consequence of uncomplimentary MOSFETs in Hbridge
In my opinion you would need complementary transistors only for more linear/analog applications like in a (audio) power amplifier.

In an H-bridge you're using the MOSFETs as switches, they're either on or off. I would prefer to use FETs with the same Rdson (on resistance) though although as long as Rdson is low enough that might not even matter.

I would also pay attention to the threshold voltage but also here different Vt for NMOS and PMOS would not matter so much if you drive them properly with a large Vgs (which you should to make Rdson low).

So I would just try to find a suitable PMOS that can do the job and not worry about it not being complementary to the NMOS.