How to fetch triplets from HLR?

Hi, all:
Several EAP types are supported by freeradius including SIM and
AKA with a patch.
In case of EAP-SIM, the rlm_eap_sim module can calculate tripelets
itself, and also can obtain triplets from an exist file by using
rlm_sim_file module. The rlm_sim_module reads triplets from the file
named simtriplets.dat.

(1) I believe that triplets can also be obtains from a external
palce, am I right?

(2) If I want to fetch triplets from a HLR of GSM network, how
could I do? Wether I need to add a module like rlm_sim_file? How to
add such a module?

(3) Does this module exist? Some one using EAP-AKA is also prefered!

Thank you!
-
List info/subscribe/unsubscribe? See http://www.freeradius.org/list/users.html