gpchocolates

I would infuse cocoa butter similar to infusing cream for a ganache, then add the cocoa butter to your chocolate and temper as usual.

Unfortunately there are really not very many good stock options available. I recommend putting the investment in, and it is a sizable investment into custom packaging. It really takes some time in the beginning to figure out what product lines/mold sizes that you are going to proceed with, and you need to take the time to figure it out in the beginning because if not you'll ebd up with a few thousand worthless boxes, or be stuck selling a product line that's not performing. I used Bryant Mark and Associates, I think from Maryland for my boxes, you can see at georgepaulchocolates.com They were reasonably priced with a decent turn around time. There is also Glerup-Revere in Seattle but the minimum is higher at about 2,500 per size. I'd recommend finding a box you like (seems like you have), and narrow it down. For paper boxes I'd check out Universal Paper Box in Seattle. You'll need to narrow it down to an exact size and quantity you need to start getting your quotes.