IBM 73P3312 Thinkpad Multiburner Plus - What OEM?

Hi,
does anybody know who is the OEM maker of IBMs Thinkpad Multiburner
Plus (IBM part no. 73P3312)?

It's a multi standard 8x DVD+-R / 3x DVD-RAM single layer slimline
burner with a caddy tray. The drive that comes closest to it is
Matsushita's UJ-835-B but this one has a Slot-In feed.

BTW, I don't own that drive, and I don't want to buy one since IBM
sells it for 440 EUR (USD 589.60 !!!) in Germany.

I just want to find the OEM of that drive. It should be available for
about 200 $.

Best wishes,
Dieter