Have you tried Jason aka Budfreak?
http://www.svxpartscentral.com/
Jason has a 4.44 rear diff listed at $140 plus shipping. I don't see a 4.11 listed, but if you give him a call he's sure to help if he can.
Joe
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Black Betty [Bam a Lam!] '93 UK spec, still languishing
Betty
Jersey Girl Silver '92 UK [Channel Isles] 40K
Jersey Girl @ Mersea
Candy Purple Honda Blackbird
Plum Dangerous
White X2 RVR Mitsubishi 1800GDI.
Vantastic
40,000 miles Jersey Girl