I need some direction - for fine-scale printing.

OK, to elaborate a bit... I'd like to produce (on a small scale) signage that is similar to Blair Line quality... black or simple colors on white plastic (I presume mylar) sheet stock.  Stiff enoght to stand upright.

What I'd need is recommended printers, inks, substrates.  Sources would also be welcome!

Also- does anyone have experience with -do-it-yourself decals - what ink / printer produces fine results? (I'm thinking Micro-Mark materials-   http://www.micromark.com/Decal-Paper-Try-It-Pack-For-Ink-Jet-Printers,8257.html)

Thanks in advance!