Welcome to our little HD group MG.
Are you saying you want to extend the kickstand in order to make it more easy to reach? If so, you really need to consider how important it is that the lean angle on a 650 lb motorcycle is well designed, too little lean and it could fall over to the right just because you bumped into it, too much angle, and the kickstand will shove itself down into solid asphalt and the bike will fall over while you are in the store. I know about that one very well.
Maybe some extension to the foot-hook doohickey will give you improved access, if that's what you need.