Ordering Personalized Donation Envelopes WITHOUT the donation slip

I saw that there was one older conversation about this, but no clear answer. We have (I am not exaggerating) a surplus of at least 900 donation slips, and are about to run out of envelopes. Every time we get a new Bishop, and order new customized envelopes, there were leftover donation slips we still used when we threw away the old envelopes.

I see that it is possible to order individual blank envelopes for $.05 each, whereas the bulk boxes are $30 for 900 ($.03 1/3 each).

Is there really no way to place an order for customized envelopes without receiving more donation slips?

Same here. Rather than discard the old envelopes, I printed new address labels for the new bishop, and recycled the old envelopes.
We only have a small handful of donations each week, since most members now donate online.