Need Realistic silk thistle stems, not in an arrangement for use in craft business.?

We need very realistic looking silk thistle stems, silk shamrock plants with the little white flowers, silk purple Heather and silk yellow Gorse to be used in professional applications for resale. We have tried local craft stores and their websites and googled through numerous pages on the internet. We are looking for a commercial supplier in the US so we won't have to pay over $70 just in shipping to get them from a fantastic source located in Scotland. We are not looking for pre-made arrangements.