This article might be wrong as it refers to a "not yet published ICAO list" as its source, however it states that basically all biz jets and airliners (excluding the 787 and A380) have some form of WAAS/SBAS certification option available to them.
The fourth paragraph refers to the above mentioned:
Waas Delivers on Promises and Signals Further Innovation | Aviation International News
The article I think is fairly interesting and it also talks about GBAS and GLS approaches.