At this time i am building a amp with 2 x UCD400oem, 2 x UCD180oem and 1000Watt SMPS and 4 x tubebuffer/ activefilter in one case. This is for active biamping my dynaudio audience 122 speakers.
You can also check www.thlaudio.com. This firm is located in Taiwan. They may have something alike but NOT your personal choice.
www.my3c.net also got some cases for Power Amp. Unfortunately, I don't think they provide an English translation. From the list of choices on the left, CASES should be second from the BOTTOM. My3C USED to be a good provider but its services deteriorated a bit recently.
www.thlaudion and www.vt4c .... I don't have shopping experience with them.
The price in my3c.net is in New Taiwan dollars. NT $1000 should be around US$ 32 or so.