Just buy some winter gloves, your hands will be cold even with handguards. You might also consider heated grips, they are sweet
rockymotomc.com has an assortment of heated grips (or elements to go under your grips) as does twistedthrottle. rmc also has a big selection of handguards.
For quick and easy warm hands you could try a pair of hippo hands. They look as goofy as they sound, but would probably fit on a monster and are very warm.