Well, I did go to Dealz, but I couldn't find erasers - probably not the right time of the year for that. But a quick trip to Dundrum Town Centre sorted that problem.
However, the erasers I found in Easons and The Art & Hobby Shop were smaller than the Cheap Joe's eraser I used this morning. That leaves me with less room to manoeuvre, but I managed to carve a few more stamps all the same. What I'll do with these I have no idea, but it's so much fun!