That is STUNNING! absolutely lovely and am sure an amazing transformation.
I would design my own decals in a classic style.
I can image a custom white metal eagle headbadge (theres a contact been mentioned on here somewhere that does them for a good price), and then gold rimmed black "British Eagle" and "Touristique" decals in a classic serif font, perhaps make "Touristique" italic.
I have been thinking about it, this is a tweaked font i tried, gold with black lining. Not sure this is the the final result.
About the headbage, i have been thinking about a custom eagle yes, but i have also been thinking about a custom logo that has nothing to do with the bike itself but more to do with me. This requires further thinking...