As an alternative to making mould and casting the electronics in resin epoxy is the possibility of the end user using the sugru to form their own enclosure.
The image above shows the sugru formed using the finger squish method.
Users would need ot use thin white sugru above the illuminated LEDs but would be free to form their own shape and add their own colored sugru.
An additional advantage, other than removing the requirement for production of resin casting, is that it is understood from a non legal view, that the end user assembling the final device from the component parts and sugru housing would allow the talisman to be classified as components and not a final consumer electronics device. Because of this, there would be no requirement for the Talisman to undergo the expensive FCC electrical and emission testing standard process.