I am the ultimate HHGTTG fan. I've read all the books many times. I own recordings of the original BBC Radiophonic Workshop episodes 1-12....recorded from PBS radio broadcasts and edited by me to eliminate all adverts and promos. As well as recordings of all episodes of The Secondary Phase, Tertiary Phase, Quandary Phase and Quintessential Phase....all recorded on cassette tape from PBS radio broadcast...cleaned up and copied from cassette tape, to CD-ROM disc.
I also have a recording on cassette and CD-ROM of Douglas Adams reading the original novel as an audio book. This was given to me by a friend back in...1987 I think.
I also have the 1981 TV Series (made after the original BBC radio broadcasts) on VCR tape and copied to DVD.
It took me years of recording and doodling about, but, a worthwhile project/endeavor, I think, considering the price I'd pay for this on Amazon or the like.
They make GREAT listening in the car for long road trips.
"And for all you lesser evolved lifeforms, the trick is to bang the rocks together, guys."