I am in Montreal, and having most of my aftermarket stuff done at the dealer, but when researching places that could do some of this work out of ON, Champion kept popping up. Spoke to a guy there, they are an official Paragon Perf & Borla dealer too. They do lots of stuff, from suspension (lowering) to full catback, headers, etc. Not sure if they install aero too but you could ask. I don't know any of these guys personally, just passing on info I found out during my research for places.. Will likely drive down again (from Mtl to ON) to deal with them once I am ready to do a full Borla setup).
Nice color combo btw !!! I just ordered the same but full RB for roof and accents, will be modified too (full CF aero, drop, rims, accents) so keep an eye out for the big reveal come June timeframe (around GP weekend).
I put the link but removed it in case I am not allowed to do that here, can look them up, Champion Motors