I bought 10 event coverage from WSIB (actual policy underwritten by Chubb insurance). Both organizations are a pleasure to deal with. For WSIB you declare your own car value + mods value. They are OK with whatever value you want covered as long as they are reasonable.
2011 E92 M3 DCT
1991 Spec Miata
2008 E92 M3 DCT - KW Competition 2-way / Brembo 365 BBK / OMP ARS racing seats / rear seats delete / GT4 aero / AiM EVO4 data logger / SmartyCam racing camera
2008 E92 M3 6MT
2008 E92 335xi