external usb case for slimdrives?

[dr.b]

I use a 2nd HD and also the mutliburner. But somethimes i need both of them. An external hd-case is no option, cause i use the 2nd hd about 80%.
So, there are several external cases for slimcd-drives, but they use the common 50 pin connector and the ohne on the slimbay is different.
One solution would be to use the adapter from slim to 2000 bay an the the external 2000 bay case...but thats to big, to expensive to old...and so on.
Any other solution? ( Or hint to mod a normal slimcase, soldering no prop)