That's odd. I bought my Bolt from Maguire in Upstate NY in September. I had to leave PA to get it since we had just one Bolt here at a dealer, and they didn't seem like they liked selling them or wanted to get any more in.
The day I went to pick mine up from Maguire, they told me there were getting 14 more in. They also had a few sitting around on the lot but were reserved.
I looked at CarGurus just now which I used, and I see Ithaca NY still has 7 2019 Bolts listed. That's Maguire.
Probably a better way to go newer than going older, considering 2019s are still around and you'd get newer features and probably some great deals going into 2019.