Metallic Gum Glitter type of thing?

I'm looking for a screen-printing service that lets me do 3+1 color prints. I want to do a few special edition shirts that have a glitter/metallic effect on top of them.

Any ideas? I won't deal with cumbersome companies, just upload a PDF and get an online preview is enough. The ones with the cumbersome workflows make you pay for their intellectual shortcomings anyway and I don't plan on funding morons.