Need help with frinding the right baby walker?

i wanna get my son a walker hes 9 months old..well were i live they dont have much to choice from and every store has the same ones..dose anyone know were i can find a walker that looks like a truck? or a hummer?..my hubby is a marine and his uncle seen one but he cant remember were he seen it at..if anyone knows of walkers that u realy dont see alot of that would be great..thanks