If you want a scouted up Typhoon you could just arm two of the passengers with Missile Launchers

Have another couple of guys on there as loaders and you've got a Storm-based Typhoon. Magnetize the Scouts and you can swap out the
ML guys for standard guys when you just want to use it as a Storm.
I think the whirlwind launchers would be waaaay too large for a Landspeeder.