On disassembly I found that the bearing slides (WE1M504 & WE1M10564) had worn away and that the drum had worn down the plastic housing on the drum support bearing (WE14M124). I ordered parts from Appliance Parts Pros after comparing prices (including shipping). I also ordered the Duct Felt Seal (WE08x20441) as the old one was worn. The parts were ordered on a Wednesday around 4 PM and arrived by 9AM the next day, shipped from KY to Central NY. I installed the new parts and was good as new for a total of $68 and change.
Instructions for replacement were included with the order but the appliance construction is simple enough to figure out. Video instructions can be found on YouTube.