Manual to Automatic Harley Davidson Sportster

I'm a 57 year old woman with a 2008 105th Harley Sportster. I would like to change the manual clutch to an automatic. I have seen this on a white custom Harley owned by another woman in a Harley Store for sale.  I love my 105th and would like to know how to do this; where to do this and how much would it cost. My left hand is starting to have problems with the clutch  

The only automatic transmission I know of for Harleys is the Walters unit, but it's designed to fit Dyna models exclusively. It's very expensive (like fifteen grand) and drastically alters the bike's appearance.

http://www.waltersautomatic.com/

However, there are several devices available that reduce clutch lever effort, and they're all relatively inexpensive and easy to install.

The MRC clutch assist decreases lever effort by 50% by using a shallower-than-stock ball & ramp mechanism. It's a simple approach, but it also decreases clutch plate separation by that same 50%, meaning if your bike clunks into gear now, this will exacerbate that condition.

http://www.phaedruscycle.com/

Another method is to extend the ball & ramp mechanism's lever. It accomplishes the same thing as the MRC unit but in a slightly different way. It also reduces clutch plate separation. There are several versions of this device, such as Easy Pull:

http://www.easypullclutch.com/

AMP Research uses yet another approach. Their spring-assisted device works very much like the mousetrap on a Panhead. It reduces effort at the hand lever but doesn't reduce clutch plate separation, meaning your clutch will more fully disengage (no clunk or drag). The downside is that it mounts on the handlebar. It's small but not invisible.

http://www.amp-research.com/products/misc/motorcycles.asp

There's one more way to solve the problem of difficult clutch lever operation, and that's to develop your arm muscles. There are exercise gadgets specifically for this, but easiest way is simply to ride.  
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