make one yourself?
Quote by Demonikk
'Practice amp' = amp you practice with? In my case, Peavey 6505+ and 4x12
I don't do things small

Except children.
Make one yuorself using chord shapes you find difficult, if possible make it musical and interesting, like modulations and extensions.
try this one..

Cmi6 (C Eb G A) inversions using top four - middle four - bottom four sets of strings
inversions using low E string and D G B strings -
inversions using A string and G B E (high) string -

Resolve all chords to G7

Cmi6 is also a F9 .. resolve all chords to Bb7

Cmi6 is also a Ami7b5 .. resolve all chords to BbMA7

Cmi6 is also a B7#5b9 .. resolve all chords to EMA7 and Emi7

yeah some fingerings may be very difficult..and do not sound great...but with practice...

this should keep you busy for several months

ohh yeah...do this in ALL keys..

play well