If you have a 3D printer and want a charging base, I modeled one up and put it on Printables - Reekon T1 Tape Measure Charger Base by menerso | Download free STL model | Printables.com
You can tweak the model if you want at OnShape (free accounts available) - Onshape
Since my battery dies so quickly and the only option that support gave me was to take out my battery every time I don’t use it (which seems dumb for a $250 tool), I made something where I can drop it in the base when not using so that it keeps charged.