I will respond to both of your questions and lock this up since no further discussion should be needed after.
There is no Reach EOD helmet yet. I know one or two people have mentioned modeling one, but no progress has been shown yet. Best place to keep your eyes on is the Reach files thread. I need to update it but the last few pages always have discussion on what's in the works.
And as for the avatar: if you have to ask, you should probably change it. You want to have some humanized animal wearing armor or something that's one thing but I do think your avatar is better suited to places other than this forum. I'd suggest a change.