I wrote a collection of tonguing exercises which you can use as a warming-up for my staccato books. Most of them are just 2-4 bars but you can transpose them and practice them in all keys.
I wrote them for single tonguing but they can also be used for double (ex. 1-81) or triple tonguing (ex. 82-100).
Please take a look at my staccato books to, they are on sale at the moment at qPress Music Publishing.