If you are near a petland discounts, they all sell live by me. Other than that, I would type into google “reptile stores near me” or exotic stores. Although I’ve never done it before, Craigslist usually has people selling feeders. Facebook could be another option. There are several FB groups for reptile keepers in NY. I never post on there but people sell all sorts of goods. Last option I would say is the White Plains reptile expo. Next one is the Sunday after Thanksgiving. I’ve never been but I would imagine there are at least a few vendors selling live rats.
Just as an aside, my BP is nearly 5 years old and I have always fed live because he refuses F/T (working to change that*). While it doesnt have to be right away, I would suggest following the methods that the much more experienced keepers have suggested to get your BP on F/T. I wish I had switched mine over to F/T when he was younger.
*I don’t have any ethical issues feeding live. F/T is more appealing to me because it removes the chance my BP suffers a bite from a rat.