I downloaded (bought) some SD70s yesterday and have no missing dependencies. Make sure you have downloaded any dependency packs for the SD70s.
Your two missing assets belong to the CBVR SD70:
<kuid:845493:101618> EMD SD70 cab mechanism type 1
<kuid:747511:101186> Danks Nathan K5LAR-24 (Steel Bell) #2 3-Part