I had a 4.44 installed in my NC case by PuddyMod Racing. Shoot Ben an email there. He knows his stuff and built me a great diff for my DP MX5. He can be reached at PuddyModRacing@tampabay.rr.com
He has tons of options available for gearing, can do cryo-treating, and can even rebuild/service OS Giken LSDs.
Anyway, tell him I sent you. Great guy, great turn-around times, and great service.