RVSM - you donīt need that really- I do know, that the AERODIENST at Nuremburg/Germany just put RVSM on several B300 and B350. Your contact there would be Mr.Gsaenger, head of the Avionics shop, 0049 911 9356 505.
TCAS, EGPWS, DFDR, CVR - NOT REQUIRED
406 ELT and Mode S Transponder - required from jan 01 2005.