The first place I look for seeds is my own seeds because these seeds are carefully selected from plants that have grown well and produced a tasty, disease free harvest. In so doing that have adapted to my micro climate over several years. Nothing anyone else has is going to be better than that. Second choice would be Comox Valley Seed Bank because these seeds are locally adapted and carefully selected. Seeds not needed for the seed bank may be available, see their website. Next would be local suppliers such as Good Earth Farms, Salt Spring Seeds and others that normally come to Seedy Saturday. These vendors are mostly growing on the island although some will also have seeds from growers throughout BC. CVGSS has a list of vendors.
For new varieties or seeds not otherwise available locally, I would try Baker Creek - US based with free shipping, or WCS or William Dam Seeds. In these latter cases choosing the right variety is critical since they sell to a large customer base with different growing conditions.
If you are still looking for sweet Italian red pepper seeds, let me know