Sorry i am in the UK so my suppliers & recommendations will be of no use to you,hopefully our members may have some suggestions for you..If it helps any here is a list of the ingredient's in the seed mix i use...
Ingredients: - 27 - Medium Striped Sunflower Seeds, Buckwheat, Paddy Rice, Peanuts, Chillies, Micronised Barley, Yellow Maize, Red Maize, Safflower Seeds, Groats, Walnut Pieces, White Pumpkin Seeds, Sultanas, Diced Pineapple, Coconut Pieces, Micronised Peas, Diced Carrots, Almond Nut Pieces, Hazel Nut Pieces, Clipped Oats, Red Dari, White Dari, Hemp seed, Diced Papaya, Banana Chips, Cedar Nuts, & White Sunflower Seeds.