Whirlwind MB-4 questions

Not sure if a Whirlwind is considered US Vintage, so I hope this is in the right section of the forum...

Got ahold of a Whirlwind with the Tecumseh H40. Oxidized red paint with faded decals but most of the parts seem to be there. Got it running over the weekend and took a quick ride, but it'll be a project to get everything right.

A couple questions:
1. Are decals still available for a Whirlwind? Would like to have them after a rattle can paint job.
2. Has anyone used the thumb-style throttle control? I really liked it on the PWC.
2a. Also thinking about a hand brake instead of the foot brake. Has anyone done this modification?
3. What foot pegs came on the Whirlwind? Previous Owner welded rods to the frame. I think he learned to weld on this mini bike.
4. Are there a lot of these out there?

IMG_4098.JPG IMG_4099.JPG IMG_4101.JPG

Thanks in advance for any help,
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