I can build it on Audi web site but what is the cut out date for placing factory orders MY2008 ?

There will not be B8 Avant with either 6-speed manual or 3.2 engine so I hoping I could still get B7 with that configuration.

My dealer said yes, at least to the end of May. Your dealer may have different rules, but it's apparently technically possible. I was also looking for an avant with manual. I did a national search, and could only find one or two available. In the end, I got an '07 SLine manual with 6k miles. New enough!