I have all the information for you.
The wing is a fairly decent quality wing of Amazon I got for around $90. (https://www.amazon.com/dp/B07TJFLL62)
The valance panel I ordered directly from ford. As it was the only way to find it without paint. Cost around $400. (https://parts.ford.com/shop/en/us/body/bumpers/bumper-assy-rear-8989799-1#sectionId:4214632) Specifically you're looking for 17232 and 17F828.
And lastly the exhaust is a custom job, muffler delete, then piped back out the rear with a fswerks exhaust tip, coat around $200. Sounds pretty good to me. At least out of the 2.0, not sure on the 1.0 (https://www.fswerks.com/products/fswerks-stainless-steel-exhaust-tip-ford-focus-st-2-0l-2013-2017)