Not sure if it's too late and if you already got your gears or not, but there is always a listing on eBay for motive gears, it is a listing which includes 4.88 gears for the front d30 and rear 8.8 with master install kits for both axles. It is $498 shipped to your door. If you go on eBay and search "Jeep 8.8 Dana 30 4.88" it should pop up. I have been planning on getting them but not quite ready yet, I'm still trussing mine and setting up the 8.8 but they are the best deal I have seen anywhere.
Klint 96 xj