Maybe AO reconsidered carrying Elk? I had previously purchased Elk products from AO and had a good experience with the purchase. I'm glad to hear they are carrying Elk again.
At the time I posted the original message above... I don't remember all the details... but I ended up calling AO to order additional Elk items and they told me they no longer carried Elk products. I then called Worthington, they were able to get the parts I needed and the experience with them was just as good as my purchase purchase from AO.
Both have comparable pricing (in my experience.) But, you should pick-up the phone and ask for a quote if you want their best pricing. Also, with both vendors, they just drop shipped the products direct from Elk to me. So, I suspect either one can get whatever Elk product you need.
I do recall the Worthington rep saying they had a most of the products I needed in stock, but some of it had to be drop shipped and since I live closer to the Elk plant it would probably be quicker and cheaper to drop ship the entire order. In both cases (purchase from AO and Worthington), I received the product in less than a week of placing the order.
I don't think you can go wrong with either vendor. But, either way, call to get quotes.