Where do you find steel plates in maple story

Steel plates cannot be found in MapleStory. The only way is to:
1) Forge it using 10 steel ores and 450-500 mesos at either Vogen, Pi, Mr.Thunder, Muhamad, Chrishrama, or Chris.

2) Complete one of the following quests: Nella & Kerning City Citizen's Request, Keol's Order #2 Keol's Order #5 quest.