Vintage Synth Repair

> I bought a Wurli 200A without speaker in it. Does somebody tell 
where  I can
> find new ones... Or if I could easily replace them by new.
> 
> Two 4"x8" Oval  (16 ohm)
> 

Finally looked at my schematic, and the original 2 16-ohm speakers 
were wired in parallel, giving you an 8-ohm load.  You could either 
use a single 8-ohm speaker, or use 2 4-ohm speakers wired in series.