Wazzimodo:
Eriosyce and Pyrrhocactus are in the same genus now.
I don´t know if the folowing link could be useful
Alfonso

Here is a link that might be useful: Eriosyce

Cheers for the help,
It's great to have all these people putting in little bits of information! They all add up to me being able to narrow the search to a point where an acceptable conclusion can be made!
So; Eriosyce curvispina it is!!!
Wazzimodo

Wazz,

I really don't think it is an eriosyce.
Looks north american...
Are there any grooves on the top of the tubercles?

Peyton

Nope, plant does look like eriosyce curvispina though