SATA DVD/CD needed for MacPro

I have a MacPro of this generation:

Mac Pro - Technical Specifications

I bought off Ebay and it has no Optical Drives so I need to add one

Can anyone send a pointer to a suitable drive....needs to be SATA2 / CD/DVD RW....the spec of the system has:

SONY DVD RW DW-D150A:

Firmware Revision: 1.MG
Interconnect: ATAPI
Burn Support: Yes (Apple Shipping Drive)
Cache: 2048 KB
Reads DVD: Yes
CD-Write: -R, -RW
DVD-Write: -R, -RW, +R, +R DL, +RW
Write Strategies: CD-TAO, CD-SAO, CD-Raw, DVD-DAO
Media: To show the available burn speeds, insert a disc and choose View > Refresh

Apologies - I just realised it has one - all a matter of pressing the eject button on the keyboard !!

Mea culpa !!

All part of the learning experience.