[Plugin: does this exist, suggestion pls]

I’m looking for suggestions for a plugin similar to more fields.
i really like this plugin but it doesn’t seem to do quite what i’m after.

you have all probably seen blogs that have ’21 best designs ever’, these posts always have
a brief intro then a list of xx designs in a specific ( custom fields ) format.

Maybe u can see where i’m going with this, i’m after a plugin that will allow me to define
a “box/group” that contains custom fields (like more fields plugin), that gets added to the
new post page, BUT allows me to add it multiple times with a simple click of a button ( 21 times in the case above).

In away it would be like a ‘shop’ plugin that allows u to add pre defined products at will to a new post.

any ideas or suggestions?