Catches and stubs from a Thinkpad optical drive

I have a T420 which came with a DVD/CD burner. I later replaced this with a Bluray drive. To make the swap, I had to remove the side catch and rear stub from the drive. I'd like to swap back to the DVD drive just in case so as to avoid any needless wear on the blueray drive's mechanism. To do this, I'd like to get another catch and stub. The problem though, I don't know what these things are actually called, nor do I know of any sort of part number to look for. Does anyone here know anything useful on tracking down these things? -- David Griffith dave at 661.org A: Because it fouls the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail?