You probably won't find a free copyrighted manual. Sounds like he may not be able to afford to ride a dirt bike. If he really cares about it, it will be the best money he ever spends on a bike.
Any Suzuki dealer will be able to order the manual, can't help if he doesn't want to pay for it though. Only other option is to watch Ebay as there is always scammers out there selling scanned pdf's as a factory manual on a cd for pennies.