The Washburn GC31R case might fit.It is rather oversized and comes standard on some of the higher end USA built Washburn electric guitars.I would call Washburn customer service at [847] 949-0444 and ask them.
Ed
My current stable of electric guitars include a USA Washburn WI70 Pilsen XL,USA Washburn CT-3,USA Washburn MG-120,USA Washburn WMS Studio,USA Hamer Studio,American Fender Custom Strat and a USA Hamer P-90 Special.