Um .... any pioneer drive. I think you might still be able to find a 107, if you look really hard.
Even in Oz, I can't find anything below the 108 though.
Any reason you insist on a pioneer?
The benq1640 / the NEC3540 / Liteon1693 / LG 1643 are all great drives ( and there are many others as well), and can be whacked in a firewire enclosure, the LG I found best for the (usb or firewire) external enclosures though
Personally I've find the pioneer 108 to be very picky with media. And it performs very badly with, apparently, supported media, even expensive TY/MCC media.