Excalibur makes for both "handed" (i think)...vixen, phoenix, exocet200, exomax, ... and im not sure for Excalibur Relayer Y25.
Darton (great lakes) makes for both "handed". TenPoint both handed. I think most of all crossbow "looks" both "handed"

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Parker safari classic is right "handed" .... m just guessing
Milan.