The variation that one typically sees of Alpha and Omega are the capital letters. Many or most churches would have these available for reference. If you look at the fonts available on your computer, chances are that you have them as well (look for the Symbol font, although there are also other fonts that likely have them in their character set, or use the Insert Symbol tab if you are using Word). The lower case letters look similar to the ichthus fish and a cursive lowercase w. If you look at the wikipedia references, the lower case variations are on the right.
