I've ordered a part from Design Corse as recently as last October. I was extremely happy with the overall service, including excellent parts selection and prompt delivery.
Owning a small business is difficult enough, but I imagine the difficulty is amplified serving an ever-shrinking niche market catered to high-end motorcycle aftermarket components.
The closing of a long-serving business is a sad thing to see. I look forward to supporting other niche shops out there by buying parts from them in the future.
I had excellent service too, as for niche suppliers etc, 100% with you on that one. I try to support those who support our bikes, especially the small ones as they seem to be at the front of development for the bikes we love.