Does anybody know where I can get decent double disc slim cases for the James Bond Ultimate Edition discs? The cases that came with them don't seem to hold the discs at all. Thanks.

Memorex sells good double-slim cases. I think you can them (20-25 cases) for $15-$20 at Staples and/or Office Depot.

it might vary per store but the best buy near me sells them i packs of 10

I've bought double slim cases from sources like supermediastore and other places but none of the ones I've ever seen are as slim as the Ultimate 007 Edition. Measure the thickness of the ones you're replacing and try to find a match online or B&M otherwise they won't fit in the boxset. You'll need the metric measurement (looks like it might be 6mm).

There seem to be two types used in the sets. One type works well, the other doesn't. The type here:

http://www.supermediastore.com/black...-dvd-case.html

doesn't seem to even hold the discs at all, but it seems to be the only type online for sale

I've ordered those very same cases in your link and the hubs hold the discs well enough for me. The worst ones are where the hubs are exactly opposite each other and push against themselves when closed. The 007 cases which don't hold well are the Scanovo ones that I found in one of the sets I've recently received. Those cases at supermediastore are 7mm and the Bond ones are close to 5mm so they're not the same thickness.

I've purchased some new 2 disc cases which will fit the Bond boxset perfectly (5mm). The cases to look for are Trisonic "Ultra Thin Double Sided" UPC 039612131222 Manu.# TS-312DVD-M5. The discs are off-centered and held tightly. Mine were found at a 99 cent store for a package of 5.