Here are a couple of the manufacturers that make a spiderless direct mount chainrings. I was waiting a long time for MRP to have some 32s in stock and came across a couple other manufacturers. Post up if you know of some others, and HBC doesn't count.

Mountain Racing Products home of MRP, White Brothers, Kreitler, Tamer, and Power Grips | MRP Bling Ring Chainrings
1×10 Direct Mount Chainrings « North Shore Billet
Product Catalog (gotta scroll to the bottom for this one)