They stopped making those flips several years ago. As far as I know there were never any pages made that held them.
I used to use the flips for the club auction. This year I fell short and just about managed to beg, steal and borrow enough. Next year I will have to do something different.
After literally days of searching I came across a supplier advertising them. I paid a fortune (relatively) for 500 by the time I got them here, only to find that only one pack of 100 were the correct ones. The others were all 'regular' size.
The 100 I got was not going to be enough for myself, and the return postage cost outweighed the benefit of the refund because I needed the regular ones.
So I have 100 here, that cost me $22 (they used to cost about $6). If you want to pay the $22 plus postage you are welcome to them.