OK, thanks for the feedback. We won't need to worry about complicating pricing; I got a quote from TTI this morning.
$0.19 each @ 20,000 pieces, they can package in lots of 100. 10K pieces available immediately, the balance in "10 weeks", except verbally they said it would be much faster than that. (But to be clear, please don't count on that, and I have no ability to influence it.)
Will finish up the GB text and start however getting that approved works this evening.