> Does anyone know a way to hack the A-145 to accept clock and sync the LFO and not just a reset in.

I could be wrong, but I believe there are two ways to sync an LFO to a tempo:

One is to use the "tap to tempo" method, where you time the interval between the last two pulses/triggers, and extrapolate from that that the next one should be the same time. This would involve a fair amount of electronics and/or firmware code.

The other would involve merely syncing an oscillator with the tempo (presumably resetting it with a "start the downbeat now" reset trigger when the music starts playing), and slewing the output with a resistor and cap. You'd need to slew it because with, say, 24 PPQN, it would only update its position 6 times per 16th note and therefore have very audible stepping.

Neither of these, to my knowledge, would be a simple mod for any existing LFO.

I vaguely remember hinting at another way that I've since forgotten, so let's hope I left myself some notes in one of my repositories...

The short answer to your question: no, not really.