Search for Bluestone sellers in Brooklyn

I am sure they exist but just wanted to get recommendations from those who have done the search already. We are repaving the front of our brownstone and need approx. 242sf of bluestone (thermal). We would like slabs that are 3’x2′ that are 1.5- 2 inches thick. We are also open to pavers but would prefer slabs. Suggestions/recommendations on vendors. FYI we have a contractor and just need the stones. Thanks.