Is it possible to refinance to an amortized home loan which we can pay off in 5 years?

Have approximately $125,000 left in principal balance with our current mortgage with a 4.875% rate. If continue with my current mortgage, it will be paid off by 2017. Would like to get a lower rate to pay down and pay off the principle balance in the same monthly payment. But not the kind that will leave me with still over $100k in principal balance by the end of Year 5, such as a 5/1 ARM. If there's no such an amortized loan, does this mean I'm pretty much stuck with my existing mortgage? Or, is there any other kind of financing or alternatives? Can a home equity loan be used to pay down or pay off my principal balance? This is for a primary residence.