It is available free in MonoSimp. Zip from library 3 of the ACAD forum on CompuServe. If you use a custom font like MonoSimp. You're allowed to send a freeware font like MonoSimp. Shx, but most third party vendors expressly prohibit you from providing copies of their commercial font files to others.
Some vendors offer special licensing arrangements.
For example, you can use the Courier New font that comes with Windows or one of the Monospace 821 fonts that come with R14. Be aware, though, that drawing and plotting performance is much slower with TTF fonts than with AutoCAD's native SHX fonts. Another option is the AscText. Lsp imports the text file as individual line text objects, and it lets you set up columns of text. In general, you should stick with simple formatting and ordinary alphanumeric characters.