[PSUBS-MAILIST] Wanted: Aluminum I-beam

[Jon Wallace via Personal_Submersibles]

Hey guys, I'm looking for an aluminum i-beam...prefer 3x5 but some derivative size might work.  Local sources are a little too high priced, online sources have good pricing but I'm seeing a lot of negative comments on some of these that is making me nervous about placing an order.
Anyone used an online metal resource that you can recommend? 
Jon
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