I don't know whether this has been raised on the forum before, but I have purely by chance discovered that the SkyWatcher USB-adaptor works just as well for EQMOD and that the EQMOD cable works for the SynScan Pro software too.
With hindsight is sort of obvious that they should, but hey better late than never
Anyway, I have attached the pricing of said cables - it's up to you which you choose...