Meinl MSTBB1 Bongo Gig Bag, material: nylon, fits for most of all bongos (up to 7,5" macho & 8,5" hembra),
My Positive Grid Spark Amplifier fits in this bag perfectly. I kept the foam packing materiel that came in the amp's original box and it helps protect the amp in the bag. There is even enough room to putt the power supply cord in there with it. Perfect solution to the "no gig bag with purchase" situation from Positive Grid.