Help! I can't get Clomid

I live in the UK and Clomid appears to be off the scene at present ( unless someone knows differently). I started the 2 week Tribex lead in to the 2 week androsol cycle yesterday, so I have 2 weeks to get sorted. Question. Do I use Nolvadex which I can get or will that depleat the effect of the androsol, or do I go it alone? I am 50 years old, trying to improve on muscle mass whist retaining my health. T levels are probably low due to age and strength is not what it used to be. If the risks are not to great I am happy to go it alone. Any thoughts Bill, Brock, Chris etc? Dan