Perhaps this might help.
My Oedipus Complex and Other Stories is indeed a selection taken from
The Stories of Frank O'Connor first published in 1953 by Hamish Hamilton. The included stories in MOP are as follows:
The Genius
My Oedipus complex
The Study of History
First Confession
The Duke's Children
First Love
The Ugly Duckling
Don Juan's Temptation
The Bridal Night
A Salesman's Romance
In the Train
Pity
The Majesty of the Law
The Paragon
Song Without Words
Uprooted
The Miser
The Cheapjack
MOC is available for Kindle at amazon.com {which I assumed was the US provider} at:
http://www.amazon.com/s/ref=nb_sb_no...+other+stories
I found the Kobo edition here:
http://store.kobobooks.com/en-ie/Sea...+other+Stories
If you have an apple device it is also purchasable in the iTunes store.
Here's a link to ABE which would save you money:
http://www.abebooks.com/servlet/Sear...+other+Stories
Finally, one can get a brand-new copy delivered world-wide postage free from The Book Depository at this link:
http://www.bookdepository.co.uk/My-O...ctCurrency=USD