I actually had the same thought, and grabbed a pack of union lock stitch needles (1143 A, HN 84/63) when I bought my awls.
Left is the UL, right is the puritan. I don't think height difference would matter, the difference appears to be contained to the space above the barb. I suppose it might require adjusting the looper timing a smidge.
The bigger issue is the shank length. As my machine is timed, the longer shank would be driven into the cast off and brace. I'm not familiar enough with the timing mechanism to say if this can be compensated for.
But regardless the UL isn't a direct swap for the puritan.