Knoll Light Factory Pro, currently offered by Red Giant is an excellent lens flare creation tool. You can create your own, customize theirs, or simpy use one of their decently large library of lens flares. It makes use of your GPU to speed render and response times. Also it gives you several options for keying.
It is currently the most popular lens flare plug-in on the planet.
Michael's right about Knoll light factory plugin; it's a honey. Furthermore, I don't think waiting around for a new plugin from videocopilot is worth it.
Here's why: how many people actually can distinguish an anamorphic lens flare from a normal one in the first place? Unless you have an overwhelming reason to use a spot-on anamorphic lens flare, I say fake it and get on with other things.
Who knows? You might just have an overwhelming reason, and if you have 1) the time and 2) the cash for a nifty new plugin, go for it.
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