Thanks Brian
Im located in Quebec City (yeap, i'm a french-canadian, so my english won't always be perfect ). Since my father is retired and he's building wood furnitures in his past time, I have access to a really nice woodshop (planer, double drum sander, jointer, bandsaw, shaper,... name a tool and he probably has it. )
About customs, I did a search on Canada Border Services Agency website(http://www.cbsa-asfc.gc.ca) and according to this paper(http://www.cbsa-asfc.gc.ca/general/publications/tariff2004/ch92ne.pdf) parts and accessories for use in the manufacture of guitars are free of import taxes (have to pay 7% for GST, though). Knowing that, i think i'll order my stuff directly from US. Less trouble, more choices and exchange rate is not that bad these days
For now, i'm planning to build a fretless bass from scratch. CAD plans are almost done, so buying wood, hardware and missing tools is the next step.