Looking good so far! Cooperman sells several sizes/types of gut for snares. Speak with Jim Ellis and he can set you up.
Search the forum for threads on calf heads. That has been discussed here at some length previously. My take in short: Stern Tanning produces professional quality heads albeit at a premium price - they run you about $70 a piece. There are cheap Pakistani heads available for a fraction of the price but you definitely get what you pay for - the consistency and quality varies wildly.
Looking forward to seeing this one cleaned up soon!
-Lee