About 30 + years ago there was a group called Nirvana, hits included 'Rainbow Chaser' Tiny Goddess [memory fading now[ ! ] are these tracks still available anywhere?
Just checked on WinMX and there is one user with both tracks available for download now....remember though if you do decide to get them this way then search for them by song name and not Nirvana to save you wading through hours of early 90s teen angst.
If you would prefer to buy a CD rather than download, the original Nirvana actually has CDs out... just as many early groups are now on CDs even though that technology was not around when the group was! I just checked on Amazon.com, and you can buy the CD from them today. I used the search term, "Nirvana Audio CD" and got several results, you will be able to see which are for "your" Nirvana and which are for the 1990s Nirvana. (As you know, Amazon.com will ship to the U.K.)