Daewoo Drive Mount

I ahd a customer who wanted to add a CD burner to his computer, normally this is no problem.
However, the machine was a Daewoo, and when I finally got the case off, the drive bays were specially modified to require a slide rail on either side of the drive.
I have never come across drive mounts like this and was wondering if anybody knew where to get some from since Daewoo no longer make computers.
I solved the situation by removing his old CD-Drive and replaceing it with the burner, however he did say he would like both drives in eventually.
Any help appreciated.
Cheers