Being a former Dsm owner, There is a manby the name of Ziggy Diatrich, He lives in niagra and crosses the border once a week to pick up parts from his distributers such as Extremepsi.com and SummitRacing among many others.
I personally have spent about $5000 on parts with him. Excellent service and he fully stands behind his product.
If you are interested in contacting him, Let me know,
P.s he also owns his own tool and die shop.