IIRC, the ALCM carriers were supposed to get the strakes…but I’m not sure all did. Likewise the “H”s.
My comments on the “H” spares at D-M were based more upon a hunch rather than direct knowledge, I know that some B-1s (early models from the first part of the production run) there are in reserve as attrition a.c., while others have been parted out. I’d expect the same is true for the 52s…as it’s doubtful the USAF will ever require all the survivors to be on active service again.