There is nothing close to a garauntee for long they will produce parts. The factory only warranties the bikes for 2 years, everything else is an aftermarket thing. All they have said is that
"Authorized Buell Service Providers will provide warranty, service and repair work. And Harley-Davidson expects to be providing replacement parts and service for as many years as required market by market"
I "expect" to find a million dollars in the street.