Pues pa listo yo, que despues de escribir lo de arriba, he mirado y si que existe algo, a ver si te sirve.
Un cacharro externo que se enchufa por USB y que te da un slot PCMCIA, por 200$.
https://www.alltp.com/store/detail.aspx?ID=341
De todas formas, leete la lista de tarjetas compatibles y no compatibles, porsiaca.
*** This device is NOT Mac compatible. ***
These cards DO work:
# Sierra Wireless AC580
# Audiovox PC 5220
# Audiovox PC 5740
# Kyocera KPC650
# Novatel Wireless Merlin V620 Network Card
# Novatel Wireless Merlin S620 Network Card
# Novatel Wireless Merlin U730
These cards DO NOT work with this device:
# Sierra Wireless AirCard 750
# Novatel Wireless Merlin G100 Network Card
# Dell TrueMobile 5100 Tri-band GPRS PC Card
# Sony Ericsson GC75, GC79, GC82, GC83, GC89
# Sierra Wireless AirCard 555D
# Audiovox PC 3220
# AirPrime PC3200
# CF 2031
# Novatel Wireless Merlin C201 Network Card
# Sierra Wireless AirCard 550
# Sierra AirCard 860
# Option GlobeTrotter GT MAX
# Option GlobeTrotter COMBO EDGE