Hi Tanya (and all),
I checked with the company that supplies Genox, and they confirm that the 10mg tables are currently out-of-stock, but they expect them to be available soon (they were unable to confirm how soon but it sounds like a few weeks, as Sarah noted, is realistic).
In relation to alternatives -- sometimes the additional substances in a drug (inert substances that provide a vehicle for the drug) cause problems for some people. For example, it seems that other brands of Tamoxifen contain lactose which may cause trouble in lactose-intolerant people.
If you find you are able to take some brands of a drug but not others, one or more of the additional substances could be the cause. Best advice is to talk to your doctor or pharmacist about which alternatives might be similar in composition to the drug you currently take.
Hope that helps.
Di