For now I think Hammond Leslie are still running products, they are expensive but they are the real deals.
There are some pedals too that do the job and probably you can find also in the used market for units like the vibratone or alike.
If it was me I would search for maybe a used broken one and try some repair. If you have money to spare just go with the actual Hammond units cause they sound awesome!
Anything I can help with just fire.