Top of the Pops on iplayer

Help the edition dated 15/3/79 is no where to be found on BBCi player via Sky+. I've managed to download it onto my ipad/iPhone but of course it only stays for 30 days. I've got all the BBC 4 editions on dvd but I cannot download this one from my ipad etc onto dvd. Does someone know how to put these onto a disc or have they got it already on disc & can burn it for me?>:(