I think Husqvarna up to about 1971 may have been right hand gearchange , and of course everything British up till early 1970s,
CCM still used the BSA engine till about 1978/79 . I cant think of any newer bikes with RH gear change , but if you must have it then there have been various conversions over the years, some look neat , some look awful. if you can do a bit of engineering then I expect most bikes could be changed with some work