I'm not sure which one you have, but you could possibly use their Sticker model on a modified bar end plug, so it is actually outside of the bars so it would still work. Or perhaps between the fork and the tire, at the base of the headset.
You might also be able to fit the Sticker tile in the base for the Stem Captain. They sell them separately. You could fashion a plastic top to cover it, and most likely could actually buy a plastic cap to cover it. It may fill the space completely, but I'm sure you would want to disguise it in some way.
https://stemcaptain.com/product/replacement-bases/
