Here is an MTA New Flyer XD40 bus texture, but in the blue stripe paint scheme. These buses actually exist, but without the bike rack and the back window (MTA's XD40s do not have the bike racks and the back window). So basically, these textures will be based out of SCPDArmor23's New Flyer Xcelsior pack.

Link to the model: https://www.gta5-mods.com/vehicles/addon-replace-brampton-transit-based-new-flyer-xcelsior-pack