Rolling triplets in 5/4 — Accented triplets in 5/4, based on an exercise from Ted Reed.
Reed converted to 5/4, with Dawson interpretations — Five pages, and just what it sounds like.
Jazz ostinato in 5/4 — With left hand coordination.
Paradiddle warm-up — Not in 5, but a nice daily-user: paradiddles in all inversions, with flams on each note of the pattern.
Between this and all of the stuff we've been posting, your 5/4 should be pretty cooking by now. If you've been neglecting it, well, time to get on it, kids!