heel toe shifter seems like it would work great for you.
FWIW, my sister has foot drop too (but isnt a motorcycle rider)
Dealing with drop foot in left leg.
a 57 year old new rider with 400 miles
I recently got a bike the first week in June. I have an artifical leg (left.) So a regular shifting bike is out of the question. I have a Pingle Shifter on my bike and it work very well. Pingle makes kits for almost every Harley and most Hondas. Also they have a universal kit and needs an experienced fabracator to install it. Go to google and do a search for pingle shifter. See what you think. It might take 4 or 5 hours to install it on a bike that Pingle makes a kit for. At perhaps ninty dollars an hour this is another fact you will have to deal with. If you actually get a bike practice riding it on a large vacent parking lot. Get a bike with crash bars because you will need them as you will drop the bike several times learning how to ride it well. However you probably will drop it at slow speeds so the damage will be minimal or is it animal. Also buy and wear a helmet and back, chest, and elbow protection. Be careful and ride safe. Find and know your limits. Don't exceed your limits. Did I mention to be careful? 

2008 BMW R1200R and is it sweet...