I can't either. Hammer is here: http://www.screwfix.com/app/sfd/cat/pro.jsp?id=78159&ts=54636 Personally I prefer to use a scutch chisel and hammer. I find I have more control and it doesn't hurt my wrists as much. Try www.axminster.co.uk
sorry, cant find chisels but def sell combs, in cat the number is 86686 6 pc comb set, £3.99. cant find them online though.
Noticed that the 1 1/2" is out of stock at Axminster. www.toolstation.com have both size holders and replacement scutches.
cheers they do the lot. its not for me its for father in law and as we live in spain he has taken to the spanish ways and has a beer in one hand so hard to hold two things. the spnish have never heard of a scutch hammer, they just chuck wore render at everything. cheers again