Synthesis of caffeyl CoA

[Weiting Ni]

Hi, 
Does any one have caffeyl CoA available in your lab or know where you
can get it? We use the chemical in an enzyme reaction but we could not find
it in any of cataloges.  We spent one week to try to synthesize it without
too much success.  We will be very appreciated if you could give us some
suggestions on how to synthesize it in small quantity (<500 mg).
Thanks
Weiting Ni