Ha, Ha, It's easy to create - Google upside down text (you can also do back to front). You go to a web site - type what you want into the box and then copy the text where-ever you fancy. IME you can't do some capital letters though.
ɥƃnoɥʇ sɹǝʇʇǝl lɐʇıdɐɔ ǝɯos op ʇ,uɐɔ noʎ ƎWI ˙ʎɔuɐɟ noʎ ɹǝʌǝ-ǝɹǝɥʍ ʇxǝʇ ǝɥʇ ʎdoɔ uǝɥʇ puɐ xoq ǝɥʇ oʇuı ʇuɐʍ noʎ ʇɐɥʍ ǝdʎʇ - ǝʇıs qǝʍ ɐ oʇ oƃ noʎ ˙(ʇuoɹɟ oʇ ʞɔɐq op oslɐ uɐɔ noʎ) ʇxǝʇ uʍop ǝpısdn ǝlƃooפ - ǝʇɐǝɹɔ oʇ ʎsɐǝ s,ʇI 'ɐH 'ɐH
In explanation I understand that it maps the letters you type to system generated font shapes that any PC should be able to reproduce.