i'm pretty sure the DJM fit the escalade as well, but might want to give them a call to verify. I found them on autopartswarehouse.com. At the time i had a 15% off coupon, but i think they still have 10% off if you use code: APWCART00. I had posted a deal on the rear belltech in the good dealers spotters thread a few weeks ago when i ordered the rear for the escalade. Came out to around $125 shipped for the rear.
Looks like the DJM kit comes out to around $365 with free shipping, belltech comes out to $283 with free shipping. For the price of the belltechs, thats a deal. I know they were more when i ordered my kit about a year ago.