Silver Efex software
 

Can anybody help me in trying to obtain a software package called Silver Efex Pro?
I'm a keen B&W photographer and have seen references to the software, however I have search a lot of web sites and search engines and although I obtain descriptions about this package I'm being told it is out of stock with no dates when it will become available!!
Is there a problem with producing more or have the manufacturers gone out of business or is there a serious malfunction and its been temporary unavailable?
If so, does anybody know where I might obtain a copy?

Thanks, Figs

Have you tried Nik Software's website? You can even download a 15 day trial version