there is a taxi price list on wikitravel, says it was updated in 2010
http://wikitravel.org/en/LombokPrepaid Airport Taxi Fares from Lombok Airport to Selected Destinations
* Airport Precinct:: Rp 20,000 (Bandara)
* Mataram/Cakranegara/Ampenan:: Rp 29,000 (Zone-1)
* Sweta/Gunung Sari: Rp 29,000 (Zone-1)
* Sandik/Montong: Rp 38,500 (Zone-2)
* Batu Layar/Batu Bolong: Rp 57,500 (Zone-4)
* Senggigi Central: Rp 57,500 (Zone-4)
* Senggigi-Kerangdangan: Rp 72,000 (Zone-6)
* Senggigi-Mangsit: Rp 83,500 Zone-7)
* Kelui/Gerung: Rp 86,500 (Zone-
* Setangi/Malimbu/Nipah Rp 105,000 (Zone 9)
* Bangsal/Pemenang: Rp 115,000 (Zone-10)
* Praya/Lembar: Rp 115,000 (Zone-10)
* Teluk Nara/Teluk Kodek: Rp 125,000 (Zone 10a)
* Sire/Medana/Tangung: Rp 144,000 (Zone 12)
* Tanjung A'an/Kuta/Sekotong: Rp 225,000 Zone 17)
* Sekotong Barat: Rp 240,000 (Zone 18)
* Bayan/Bola Bola: Rp 270,000 (Zone 20)
* Senaru/Obel Obel/Ekas Rp 360,000 (Zone 21)
Koperasi Taxi Mataram (Airport Taksi) 2009 Last updated 26 Jan 2010