I would use the email button feature. In the create a button panel, you have the option of using the generated code as an email link. Take this code, pop it in an email to yourself. When it comes back to you, click the link and see if populates the cart with the order. If it works, you can simply create all the email links for your products, email it to the rep's and they can purchase products from that email whenever they need to. Make sense? It won't be as pretty as the button, but it will work.
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