I use a Clipper 90 Hand Truck: http://www.handtrucks.com/search/index.cfm?Ntt=clipper&Ntk=all

Since my setup only includes keyboard bag, keyboard stand, and two speakers, I don't need a four wheel setup. I don't use a mic stand since I have a headset, and I don't use speaker poles (except occasionally) since I keep the speakers on the floor.

You might find something at handtrucks.com that fits your needs.

Good luck!

Beakybird