The recommended bluetooth modules for saber boards are these days BT630 and BT909, you can buy them from TCSS, SaberBay Etsy store, me (ShtokCustomWorx) and KR-sabers (TheSaberArmory). Also these modules are mentioned in the PDF user manual for TeensySaber v3 and Proffieboard v1.5 and v2.2 boards, please read.