http://www.typophile.com/node/44746
http://www.typophile.com/node/44445

Thanks riccard0

http://new.myfonts.com/fonts/intellecta/intellecta-monograms/

Thanks paulow

An excellent non-online source (like, books) is the works of John M. Bergling, specifically Heraldic Designs for Artists and Craftspeople, Heraldic Designs And Engravings Manual, Art Alphabets And Lettering, Art Monograms And Lettering and Ornamental Designs And Illustrations. The first is available in reprint (check amazon.com) and can be had cheaply; the others are occasionally available in the original, and fetch a reasonable price for the quality of the content.

Thanks to everyone's input. Much appreciated.
M.