Rather than find a generic introductory letter, why not devise one of your own? Just remember to keep it brief and to the point. My introductory letter also includes a special offer discount voucher, which runs to the end of October.
I'm happy to proof read something for you if you would like to PM it to me.
I sent out a newsletter. But I also have an introduction letter that I use for people without email addresses listed.
It really depends if you want to go to the expense of producing a brochure. I am planning on having some glossy z cards done in the near future to use as a marketing tool, but for now I am sticking to my newsletters and introduction letters.
I'm planning on sending out brochures, but only to rhode businesses that are interested, it gets expensive otherwise.
I've got some brochures printed from vista print, I paid £37 for 50 which I think is about $18, I just had them delivered this morning and they are excellent!
Marketing Letter
Kels 
Linear Mode
