As a disclaimer, I've never used AAS; but, just from hanging out on the forums, I can tell you what they are going to say.
First, they are going to tell you that an all oral cycle is just plain stupid. Test E, Test C or Test Prop should be the base of every cycle.
Second, they are going to tell you using Dbol for 10 weeks is retarded; it should be taken for 4 to 6 weeks max.
Third, they are going to tell you, that for your first cycle, it should be a test only cycle, and that you should forgo the Dbol altogether; this way, you can learn how your body is going to react to test before adding other compounds.
Lastly, they are going to tell you not to fear injectables; don't be a pussy.
I think that about covers it.
P.S. As to your original question, if you don't want to, or can't use aromasin, you can use arimidex. You can find either aromasin or arimidex from several vendors, as either pills or as research chems. You don't need to use Z.