The Lucent Stinger® DSL Access Concentrator platform or DSLAM has been discontinued by Alcatel-Lucent (soon to be Nokia, see http://www.truepulse.com/nokia-takes-control-of-alcatel-lucent/). But this workhorse is still installed at telecommunication carriers everywhere.
When you are looking for spares to keep your system going, contact TruePulse. For example, we have in-stock the STGR-OLIM-OC3-6, Comcode 300649712, Part Number 0800-1720-001. Let us know if you are looking for those, or any other Stinger requirements.