This is probably too obvious but have you looked at the PI sugar shorts? They are pretty short (5" inseam), but they have the same chamois as the sugar knickers. They are my current favorites ... I used to love the ultrasensors, but I really prefer the tour chamois.

The sugar shorts have a thinner material than the ultrasensors, which is great when it's hot. They are made from the same material as the sugar knickers so you already know what it's like!