If the screw holes are done for on the tank for the badges, MopedLand has self adhesive reproductions which are very well made and look good (just not concourse)
Mobylette ‘Mobymatic’ tank badges for AV76, AV77, AV78, AV88, AV89, etc. 2 × badge sets £18 pair
They also have a lot of other Moby and correct period parts and with the cost of shipping over the Atlantic it is worth filling up the box.
...also check out their "Jumble" section for some cool previously owned and NOS items...