Since lite-on pulled them from their website, maybe problems with the server or maybe bug in firmware that made them pulling it back. Anyway I did not have any problems with it, so grab it here if you want.
LTR-24102B, version 5S57 here.
And I've also uploaded NS1I for LTR-12102B, I've not tested this one.
LTR-12102B, version NS1I here.