zrwong seems to be available with pretty much any extension - perhaps for the same reason I wouldn't use the "r" in it.
zach-wong.com is available, if that's of any interest? zachwong.com is registered to an Australian artist, so there's not too much chance of confusion there. (A large Scottish travel company uses the .co.uk version of its name for its web site. The .com version is used by an American company of the same name, which is "the world leader in the product design and manufacture of thermal energy storage", so they say. There doesn't seem to be any conflict of interest, as neither company is likely to be mistaken for the other.)
Failing that, maybe you should change your name to something less common. :lol: