This is the detail page for one of over 225 audio interfaces covered in The Computer Audio Interface Guide, which also lists where to buy this interface used.
2 input (2 Combo XLR/TRS), 2 output (TRS), S/PDIF I/O, phantom power, FireWire bus power, headphone out. Comes with Mackie Tracktion software for Mac and PC. Specs say 4-input but are there only 2 combo connectors? (Tapco is a division of Mackie.)