Both of mine have the LNEngineering magnetic drain plug, so I don't have an OEM plug to verify, but a set like this will have what you need:
3/8 In. Drive Metric Hex Socket Set, 6 Pc.
https://www.harborfreight.com/38-in-drive-metric-hex-socket-set-6-pc-69546.html?_br_psugg_q=hex+socket+set