Given that Radioactive is fundamentally illegal and that those labels have licenses for the material though, couldn't they just go ahead and re-issue it anyway? Surely if the quality of their releases was better Radioactive would be priced out of the market (in the same way that the EMI reissues of Neu!'s albums made Germanofon's versions redundant).
Admittedly the sound quality on Radioactive's re-issue of Henske and Yester's "Farewell Aldeberan" is highly dodgy, but with the Straight Records catalogue in seemingly eternal legal limbo it's better than no re-issue at all.