I have a request for two full sheet cakes that have a double nickel theme (turning age 55). They both can be decorated the same. I am trying to figure out something other then two huge fondant nickels to fill up space. Any ideas? I looked at the pics that are on cake central but they did not have sheet cakes.

You didn't provide much info but here are some sheetcakes with fantastic edges & borders that could be adaptable for your needs:

http://www.cakecentral.com/modules.php?name=gallery&file=displayimage&pid=1177685

http://www.cakecentral.com/modules.php?name=gallery&file=displayimage&pid=1178816

http://www.cakecentral.com/modules.php?name=gallery&file=displayimage&pid=1148896

http://www.cakecentral.com/modules.php?name=gallery&file=displayimage&pid=940703

http://www.cakecentral.com/modules.php?name=gallery&file=displayimage&pid=954933

http://www.cakecentral.com/modules.php?name=gallery&file=displayimage&pid=830753

http://www.cakecentral.com/modules.php?name=gallery&file=displayimage&pid=820403

http://www.cakecentral.com/modules.php?name=gallery&file=displayimage&pid=725293

http://www.cakecentral.com/modules.php?name=gallery&file=displayimage&pid=710563

http://www.cakecentral.com/modules.php?name=gallery&file=displayimage&pid=459973

http://www.cakecentral.com/modules.php?name=gallery&file=displayimage&pid=429373

http://www.cakecentral.com/modules.php?name=gallery&file=displayimage&pid=406863

http://www.cakecentral.com/modules.php?name=gallery&file=displayimage&pid=335573

Double Nickel (or double digit) sheet cakes:

http://www.cakecentral.com/modules.php?name=gallery&file=displayimage&pid=1367099

http://www.cakecentral.com/modules.php?name=gallery&file=displayimage&pid=1367099

http://www.cakecentral.com/modules.php?name=gallery&file=displayimage&pid=1326836

http://www.cakecentral.com/modules.php?name=gallery&file=displayimage&pid=1281147

HTH