A quick google showed me that Malibu is made my Intermatic. You did try
google, didn't you? :-)

http://www.intermatic.com/?action=div&did=1

From that site:

To speak with a customer service representative you may call 815-675-7000 on
Monday through Friday between 8:00 am and 4:30 pm CST.

a.. If you are calling about missing or damaged parts for newly purchased
Intermatic Outdoor lighting products press 1.
b.. If you are calling to obtain warranty information press 2.
c.. If you need technical assistance with Intermatic Malibu low voltage or
solar lights OR an Intermatic SS7 or SS8 in-wall timer press 3.
d.. If you need technical assistance with any other product press 4.
e.. For information on where to purchase our products press 5.
f.. For all other calls press 6.
-Tim