Some of the components on my multi-link arms are bought from the us, rod ends, jam nuts, etc.
Everything else is machined in St. Catharines by a fabrication facility that does work for a variety of industries but mostly motorsports (Bicknell Racing Products primarily)
Off the top of my head i cant tell you who is running my stuff in DMCC this year. I used to supply Robert Ricci, Haig Kanadjain, JF Chaisson, Kevin Grenier in QC and half a dozen guys in DMCC west more recently.