Header connectors. One thing to be careful of with old motherboards, especially usb1 is that they don't always use a standard pin out on the headers, worth double checking the manual.

http://www.ebay.com.au/itm/2-Port-USB-2-0-Typ … =item4ad8bb9838

http://www.ebay.com.au/itm/NEW-PS2-Interface- … =item5d4e3854b5

just a couple of examples to help you... although those results are from the australian ebay you shouldnt find much of an issue finding them in *insert country here*

Be careful with pinouts though. PS/2 mouse header connectors on old mobos are notorious for having different pinouts for different manufacturers. Try to chase down a manual for your motherboard to double check - typically you can rearrange the pins inside the plug to match.

Huge thanks guys! Appreciate the warnings.

I tracked down a PDF of the manual, in Australia of all places http://support.octek.com.au/Downloads/Files/M … ual/P1/p12p.pdf. The USB 1.0 pinout looks like the typical 5x2 pin affair, but I'll confirm the signal pins are where we'd expect.

More interestingly, the PS/2 pinout is 4 wide (+5V DC, GND, MDATA, MCLK), whereas most after market header backplate connector plugs I can see use 5 or 6. I'll do my homework on voltages and pin arrangements to see if I can accommodate this. If there's any uncertainty, I won't use them.

Out of interest, the board uses a legendary AT plug for the keyboard, and PS/2 is listed as a "mouse connector". I suppose in later boards, the AT plug was replaced with a PS/2, hence the incompatibility between different PS/2 ports. Interesting from a historical perspective.

Just another idea - if you have the motherboard's specific model/manufacturer information you may try searching that along with terms like "I/O card" or "header card" or similar. I have an Asus, for example, which has all of this stuff on a single daughter-card that makes 2-3 ribbon connections to the board (it provides USB, PS/2, and IrDA). It's much neater than having multiple expansion slots taken up for all of that stuff.