Thought I'd help out with a tip for those looking for the best way to order online for OEM oil drain crush washers / gasket for FR-S / BRZ / Toyota 86, since I couldn't really find an answer for this searching this forum.
You can order them in bulk directly from Subaru's parts store.
$.78 cents /ea, just bought 5 and shipping is $9. So overall roughly $2 each, or as much as you'd pay driving to the dealership and buying it yourself, and a better deal than anything else I've found online so far.
GASKET - OIL DRAIN PLUG
Part Number: 803916010
http://parts.subaru.com/p/Subaru__/G...803916010.html