Then the Colorado Outfitters Association, and if not them, maybe Craig'sList or the local newspapers (everyone's online now anyway). I know I have heard of transferable tags before being offered in Craigs List.
Having said that, nearly any land of significant size is already outfitted. There is certainly a chance of finding something small(1,000 acres or less), but small parcels may not always reliably hold animals without crops or at least a major drainage. Because of the down economy, some outfitters may be overextended and underbooked, so I would think a sub lease to be the most likely bet for you.
Here is an inexpenive and effective deer feeder I made recently.
No batteries to go dead, no hoisting it up in the tree, plenty of capacity, very easy to fill - so far, I love it.
I have made two of these and they are easy to build.
An empty 55 gallon drum, some 2x4's, some PVC tubing and fittings, a little bit of hardware and some paint - and you are ready to go.
I designed it so you can stand on the lower rung and fill it - the top is about 6.5 feet above the ground.
It holds about 375...