400 Box Question

[robf]

I Just have one more tape to rip from my 4th batch of the 400 Box, and it's 22-04-1981 

Not the complete show (as it's taped over a Rush album..which I'm guessing isn't 2 hours long) and it needs the shell breaking open for a clean up as the tape is mouldy...BUT

I'm sure the whole of this show is already doing the rounds - featuring an Ivor Cutler Session and a repeat of The Fall session. I'm positive I downloaded it (possibly Feb or March last year) but I can't find it on my PC, so I may have archived it to a CD somewhere. 

Can anyone confirm if this show is already out there - if so it saves me a job on the ripping front and I can unleash the next batch of EIGHTEEN shows from 1980/1981!