We have everything you need at myVolts: 12V DC wall power supply units from 1250mA to 5000mA, terminal block connectors and daisy chains.
How about powering LED strip lighting from USB?
You'll love myVolts Ripcord: the 5V USB to 12V DC power cable lets you power LED lights requiring 12V from any USB port!
If you need anything else just get in touch, and we'll help: we love to solve power problems and no problem is too small!