There is another way of getting "Sweet Memories," Steve, so don't despair. It was also recorded by Tanner's group, The New Sound, on their Turbo lp from the early 70s. It's a far better version, with a fuller production and better sound etc. The album also has some other splendid tracks, like the former Darrell Banks cover-up "Don't Take You Love From Me," as spun by Kitch etc. in the early 90s.
Here's the catch: the album is super-rare on original (I have personally seen more copies of the Megatone 45 than originals of this lp in the last five years), but exists on both CD and high quality vinyl re-issue from Japan. The re-issues are sometimes on ebay, but I'm sure if you ask around you'll be able to pick one up for prices ranging from £20 to £50.
Hope this helps, gareth.