i've got 3x 545's. 2 were made in Mexico and 1 was made in the US. the US one, without a doubt, sounds better.....but all 3 of them sound better than the modern 57s i've used.
they're good mics for the money--i like them better than 57s, but that's a personal preference.
FWIW, the Full Compass catalog does seem to list "new" ones.
cheers,
wade