Be careful when you choose an alternative - it should be capable of 3.3v input and 5v output (HCT series etc.), i.e. act as level shifter...
But it really makes no sense because the output mode is fully controlled by firmware. And inverting option is, in fact, no different from non-inverting one.
There are only gerber files available (see above), sorry. There's almost no free space left on the pcb for additional components (taking into account that we should stay away from those high-voltage traces and BIPs).