I've used Matt Black Aluminium Foil Tape and it's very close. The stuff I've got is for theatrical lighting stuff but lots of choice available. Cut with a wad punch or scalpel/scissors.
I have available some correct Gris Acier 221 rims on correct LX hubs (rims are good rear hub needs service or exchange, front okay) and, if you did want to get crazy, original bar, stem, stem cap, grips, LX shifters, RSP bar ends.