Modern Vespa

Has anyone found a suitable replacement clip for rear reflector studs?

Also called emblem retainers or push nut, stud or push stud retainer.
Honda use them for the "H" emblem but I don't know if size is OK. Assortments cost too much for a whole box that has them. Maybe a box store hardware drawer has that size. I can find them but shipping's too high to go that way from a supply house. My auto body parts drawers (from many years of doing such work) have none that will fit.

My Lowe's store has a really good supply of specialtyhardware, you might check one near you.

Do you mean this?

https://www.scooterwest.com/items/?_pageCCS=t#page=/item_details/Clip-For-Reflector/1406?clear_cat=true

In a pinch can use machine screw nuts, will lightly thread plastic post. Easily removed if needed.

Yes. At $17.11 for two clips, including UPS for what will fit in a small USPS envelope.
To save time & gas chasing a small part that size is hard to pre-determine online, I asked where anyone had found them from a more common source?
Vehicles tend not to use these clips now days as emblem tape & adhesives took over that job. Piaggio is behind the times? HA!
FWIW, it's a 50RT to Lowe's and other retail & I do know about hardware drawers, that's why I brought it up-to see if the clips had been found there by others...

How about double sided automotive tape?

These reflectors have thin edges that are not logical for emblem tape- which I keep on hand.

Ace hardware has them for a quarter.

Thanks, I'll check them out when I'm over that way!