need 7/8'' pinstripe

[1984k30]

Does anyone know where to get a small amount of 7/8" black pinstripe.  I need like 6 feet run down the middle of my grill molding.  All the places I find want to sell a 150 foot roll for 50 to 60 dollars.  If not is there anything special needed to prep the metal for paint.  I believe it is stainless and want to make sure the paint sticks good. thanks