I don't know how close they look, or how many times you can try or whatever...
But weber sells a adapter that allows you to install a stock/factory air cleaner, that would pretty much "hide" the weber. Perhaps get one and take it to a couple different places until you get someone that aint doing their job 100%?
1998 Camry - 5S-FE, Auto - 237k
1998 Camry - 5SFE - Auto - 247k
1991 Mr2 Turbo - 243k
1982 Toyota Pickup, 22r, 5spd 4wd, Detroit locker, Warn 8274