All receivers are capable of supporting DVD-A, it's just a sound format, no different from Blu-Ray Audio. Any player that is marked as UD, universal, will support DVD-A. Same goes for SACD, it's the universal players that have this capability. You will certainly find it easier and a little cheaper to acquire SACDs than DVD-A.
Good place to find prices on the secondary market is here:
Best current option for a player is the Sony x800 as this truly does play any disc format around inc DVD A and SACD it must be pointed out that it doesn’t decode Dolby Vision but that’s about it.