Radioshack if you want to buy local for 2 or 3 bucks. They call them barrier strips.

what to use Amp Motor Controller for Wild Thumper 6WD Chassis

Hi gwen

You can try a boat suppliers .they are used a lot with the 12 volt systems , all sizes and ampages available.

http://www.ebay.co.uk/itm/Cable-commoning-block-plated-brass-8-way-ECB8-/180560766775?pt=UK_CarsParts_Vehicles_BoatEquipment_Accessories_SM&hash=item2a0a42a737

Steve_C.