Here's a papercraft firetruck link that hasn't turned up yet at Ninjatoes' Blog (more 3D rear compartment than existing models):
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An updated link to Salvador Ortega's skeleton aircraft webpage, now with nice Mexican T6 trainers:
Creatividad e informatica: Aviones escala 1/72
A webpage with really nice Osaka airport buses, vintage to modern:
ペーパークラフト | 空港リムジンバス | 阪急観光バス