Hi ourjessica
I tend not to use these myself if I can help it on the covers I make for myself, and other times I tend to use my custom square ones for others. However - the logo's that you are looking for have already been upped by a few superb members:
HelloShaun had upped the Irish ones in hi-res
here.
bobd1628 has upped some and they can be found
here.
MrHenryDog has also uploaded 200 of them
here.
And there are loads of others in the Resources - Logo's section as well
Hope this was useful to you.
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“For me, it is far better to grasp the world as it really is than to persist in delusion, however satisfying or reassuring.”