Not sure what Texas shops are charging for paint but for prep/color change on my MPD F1 hood my local shop was just about $400. I would guess that a spoiler would run about $150-180 assuming you don't have them re-install it.
I bought my used Gen I SLP spoiler from a member on here almost 11 years ago and it was painted to match when I bought it, came off the same color car. It is just now starting to flake a bit of the clear off of it after I've put around 242K miles on it. And no, it's not always been garaged. I can still shine it up good with polish/wax at this point. Just sayin....
