Not so much ligatures as swashes, Chris; I think this is the old ITC Bookman Swash, – at least the ‘r’ is, the cap ‘C’ may be handrawn. Others may have better recommendations…

http://www.typography.net/type/aspect.htm

Has a few ch ligs you will have to adapt your own for the others though.

If you want a serif Esta has a couple of ch ligs as well

http://www.myfonts.com/fonts/dstype/esta/ligatures/

Tim

Without looking (sorry, no time), I’d bet that fonts designed by Spanish/Latin American designers would have interesting ch ligatures, since ch is a single character in Spanish.

Maybe something from Sudtipos?
http://www.sudtipos.com/fonts2.htm

There was a “Type Battle” here several months back where lots of ligatures were created. This may be of some help in gettingideas. Try searching for the thread here.

ChrisL