hum, teaching this one i have to disappoint you.
to be honest, i am using this original psjailbreak dongle for factory service mode, so it still has a usage for its expensive price.
but you can use mobilephones with android or a psp with specific firmware and even a (texas instruments?) calculator for a dongle. you have to flash the mobilephone with a psfreedom hex afaik. but no usual usb flash drive, as it needs some own bootloader which you can flash.