mirroring text in corel draw 11?

[handrawn]

Hi welcome

ok so you need the sort of lettering that is adhesive backed and sticks directly onto the window on the inside?
xara will mirror text really easily and will export in pdf/x format amongst others if your printer will accept this, I gather most do.

Xara uses a horizontal flip tool - and you can do it in Illustrator 10 with the transform/reflect tool using 270 degree angle setting
Draw probably has something similar - like you I'm sure it will be in there somewhere but I dont have Draw to hand at present.
hope this helps