Livorsi has the nicest side mount I've seen for the money. Retail is at $436.
--OR-- you can buy a Gaffrig top mount set off eBay, there are a couple on there now in the $200 range, then add the pod to mount it. The pod is $175 retail, although I've seen them for about $100 from somewhere.
I have the Gaffrig in my Donzi. It's a nice unit, no complaints.