Roman Numeral Dice for wargaming

I thought it would be nice to fight my FOG battles using dice with Roman numerals on them (for a bit of authenticity).  So I looked up a couple of sites but found the price a bit offputting, given that I'd need 20 or so to cover my needs.  The Dice Shop does them - but at £1 per die (so £20 + postage!).

However, I came across the Education Shop (http://www.the-education-shop.co.uk/acatalog/index.html) which does 5 Roman Numeral dice for 50p (10p each!).  I therefore bought 5 packs plus 5 packs of numeral (as opposed to spot) dice - 60 dice for £6 + p&p. 

They also do a range of other dice and accessories so I'll definitely be heading back there.