The most solid advice I can give to anyone who fights BJ Penn is...do not motivate the guy. Lets face it, BJ although talented, is naturally lazy. Your job is to NOT convince him to step on that treadmill.
I'm assuming by "speed ball" you mean "speed bag". The only thing I know of called a "speed ball" is when someone mixes cocaine and heroin. Can't say I've seen that in a sports supply shop. Speed bag that hits back and is on a stand (while not a great description) brings to mind these two: ubs1s_500.jpg
Just a regular speedbag 4488724.jpg
Some goofy piece of crap that will certainly annoy the hell out of your co-workers.