[Boatanchors] ACCR1004 & ACCR1006 Solid state replacement?

[Maury Guzick]

Hi All
Anyone familiar with these octal based solid state replacements? 
My guess would be for 5U4 and 5R4, but not sure and so far the internet has not given up anything on these. 
Maybe someone's grey matter knows more than the internet.

Thanks
MauryW5IO