This LPS is very similar to mine...
Front
Back
With DC Cables
Procedure:
1. Attach AC plug to LPS
2. Attach DC (w/ barrel) plug to LPS
3. Connect DC plug to Q10 Pro
4. Connect AC plug to outlet
5. Turn on LPS
6. Turn on Q10 Pro
All cables (on my case) are provided when I bought my LPS.
On ebay you could find around $40-$80 but all comes from China. I don't know other sources (Amazon?). Teradak is a reputable make but cost more. Internet is your friend. When searching for a linear power supply be sure to have at least 12V 2A (Amperes).