Missing DTR ...

Hello forum.
I need to buy a lot of material from DTR but I never receive response from him.
I tried by mail, I tried here by PM .. nothing.
He is not in holidays because I can see a recent activity of him in the forum.
It seems that he want to avoid me and I cannot understand the reason, really.

Anyone can tell me a valid alternative for the diodes? I need to buy a lot of material, indeed.