I am currenly looking for the small seal character for the words 生 (Sheng) and 智 (Hui)? Which I cannot find in the wiktionary.
Did you mean you want to convert them to small seal characters? If so, you can use this converter. If you do not know a lot of Chinese yet, just enter the Chinese words you want to convert in the big box next to "内容", then hit the button shows "在线转换" (with 2 arrows goes around each other, looks like a refresh icon, on the left of the texts). Then you should get small seal characters (小篆).