Hi Deicher - a quick Google search will turn up several sources. One I found says the part number for that Stator is 87845H (Stator, Genrac RV) List price, $725.70 and being discounted down to $358.02. A bigger question is who is going to pull the genset and replace the stator? I would check out the Genrac.com web site to find a qualified repair facility near you.
Good luick and when you get yours repaired, run it a minimum of 1 hour per month at 50% or higher load - with generators, more running is better than less!!
Randy (WB5TEY) and Diane Blair
Texas Boomers, FMCA #366366 SKP #91936
'03 Holiday Rambler Scepter 40PWD