Ultra, sorry I can't answer you question. I just wanted to say welcome to cake central, and to warn you to be careful. This website is very addictive. lol. You can spend hours on here and not even realize it. It's nice to have you with us. I am a newbie. I've only been doing cake designing for a couple of years now as a hobby, so I am still very much in the learning stages. I have compiled some helpful hints for newbies on my blog if you would like to check it out. The blog address is listed below.
I have never seen a 100 mini cupcake insert. I think the problem would lie in having to have a very big box to put the insert into. The biggest I have seen is 24 minis or 36 standard, at BRP Box Shop. Maybe you could speak to them to see if they plan on doing anything bigger.
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