Here are a few resources that your might find helpful
The ACL website hosts persistent URLs for all papers in the ACL Anthology, mirrored across three continents.
The Computing Research Repository (CoRR), an archive of papers on computer science (including computational linguistics and related fields). The Computation and Language E-Print Archive (cmp-lg) is now part of CoRR.
Style files for Conference Proceedings. These style files are old and are here for archival purposes. For the most recent version, please contact the organizers of the most recent ACL conference