Did some ebay shopping again:
bunch of capacitors: 100uF
test wires with female header connectors
Dual H Bridge DC Stepper Motor Drive Controller Module Board Arduino L298N
http://www.ebaypa.com/albums/20120002/sku030020_1.jpg
Finally after a long time I should get my 4 wheel robot driving. I've been away from the forum for a while as I sold my house and moved to another.