[GreenKeys] Banner program?

[teletype at buzbee.net]

I'd like to use my Model 20 to print out some text banners.  Does anyone
know of a banner creation program?  Ideally, it would run on a PC, take a
string as input and then generate an ASCII file with large characters
composed of the normal-sized ones.  I've run across the old Unix "banner"
program, but it generates smallish letters that run horizontal across the
paper/display.  What I want is big ones that run vertical.

Anyone know of such a thing - or am I going to have to write this myself?

...Bill