Looking for the GST Side lettering Font!

[Paul_1234]

Hi again, I am looking for yet another school bus sidelettering font! It's GST's Side lettering this time, (If you don't know, the side letting is whats on the side of the school buses you see, just to say "Hey, i'm such and such district or Company") I can say that it was back around 2012. I cant really find any similar fonts but if anyone could help me out  that would be great, and thank you very much! also I have provided a few samples of the lettering to see if it could help anyone identify the font.

[Ralf Herrmann]

Should be Helvetica.

download at MyFonts