The Collaborative International Dictionary of English v.0.48:

Obtainable \Ob*tain"a*ble\, a.
   Capable of being obtained.
   [1913 Webster]

WordNet (r) 3.0 (2006):

obtainable
    adj 1: capable of being obtained; "savings of up to 50 percent
           are obtainable" [syn: gettable, getable,
           obtainable, procurable]

Moby Thesaurus II by Grady Ward, 1.0:

18 Moby Thesaurus words for "obtainable":
   accessible, approachable, attainable, available, come-at-able,
   derivable, findable, getatable, gettable, open, open to,
   penetrable, pervious, procurable, reachable, securable, to be had,
   within reach