XJRider.com

So lately I've been noticing a bit of oil leaking from the drain bolt and figured I needed to give it a good tightening and that I did. While pressing down on the allen wrench I got it to twist a good quarter turn which seemed rather drastic to me but I was not overly worried...this morning though that changed. While letting my bike warm up I noticed I was leaking a steady stream of oil so I grabbed the wrench and tried again. Sadly the head of the bold came off and oil started going everywhere. I can still get the bolt out(it appears the indention for the allen wrench is part of the bolt and head so that's all good), but what can I do about replacing the bolt. I've been looking online for a replacement or maybe something that lowes might carry that will work but haven't had any luck. Are these plugs universal? Am I cutting down my searches because I'm looking for "XJ600 Drain Plugs" when I should be looking up "Drain Plugs"?