I think the new large arbor versions of the Ross Flycast and Flywater are due to be released in October. Ross Worldwide is also going to have a new reel < $50.

The last year's standard arbor versions can be found for sale at a number of places. I have a Flywater 2 and it is a pretty nice reel. You could get a Flywater 3, which is 3.5" in diamter and have a larger diameter reel.

As far as specific LA reels, in addition to those already mentioned, some other economical reels are: Cortland LTD II ($39), Okuma Integrity ($70), Scientific Anglers Concept Large Arbor ($55), and Redington Crosswater ($39).