Another thing to consider...are you planning on installing and setting up your own r&p? If so all the usual sources are fine, if you are going to pay a pro to set it up for you then consider buying an entire chunk as a bolt-in. The labor costs for a diff setup can be kind of high, you can often save a lot on labor by buying the parts from the same source.
Currie and Perogie will sell complete chunks, but there's probably local sources as well.
i dont think detroit makes a 35 spline locker. I just bought a 31 spline locker with moser axles and a rebuild kit for alittle over 900. those axles are sweet as hell. i bought a complete diff from a guy and i got a extra third memeber with it. so im not complaining. not nodular but i dont think i will be breakin this one.