Calipers & carriers from the 8T A5 3.0tdi which is the same as B8 S4/S5 (NOT B6 S4 - see below).
321mm B5 S4 discs
Goodridge SS lines for B5 S4 calipers (should work)
Al uprights from a B6
RS4 lower control arms (I believe these should work with the uprights.. haven't tested yet)
Adjustable upper control SPC arms
Febi Bilstein solid TRE's
As the fronts require removal of the suspension, is there anything else I might as well do/replace while I'm in there?
B5 S4 Calipers & carriers
B6 S4 300mm discs
034 Bracket & SS Line kit
As the rear suspension doesn't really need to come out, I'll inspect and attack at a later time if anything looks shagged.
Got NO pads at all, quickest online website to get DS2500 from?
Might as well get new bearings for the B6 uprights too.
EDIT: Clarified 3.0tdi cross reference