Well, unfortunately SCSI CD-RW drives are ridiculously expensive right now.  However, I did find this:

http://eshop.macsales.com/item/Hewlett%20Packard/C6020I/

Now it's not super fast.  It's only 6x read and 2x write, but it is advertised as Mac Bootable, it's brand new, and it's only $13.

It doesn't have a bezel, but that should be find since you're installing it internally in your 6116.