Rotary compatibility with a Longer Laser B1 Engraver

I have a Longer Laser B1 engraver coming in Saturday. Problem the rotary they had advertised to go with it no longer available. Not even listed anymore. Anyone know what would be compatible with the engraver I have coming in? Thanks for any info.

Usually, all rotaries work with every laser. As long as the y-axis of the laser is actuated by a stepper motor and the rotary as well (99.9% of all diode lasers and rotaries). So choose any rotary that you like.