Theere is quite a bit of discussion about Pegoretti bikes on various US forums, particularly the Serotta Forum, with a far greater frequency of second hand ads than you'll find in the UK. While you do have shipping and poss import duty to consider, it'll give you a better feel for used prices and give you a good chance of finding one in your size.
Geometry table can be found at -
http://www.mosquito-bikes.co.uk/htdocs/ ... name=bikes
Competitive cyclist market them and have a chunk of info, too.
The issues I faced with sizing related to the length of the head tube - they tend to be longer compared to the top tube, than most makers. I had to look for a low stack height headset and a 73 deg stem to get my bars low enough. Essentially, DP produces a sort of Freuler design, with a dropped top tube. The head tube extension can be cut back if necessary (not that I'd take a hacksaw to a Peg, but would trust a decent bike shop or frame builder to do so).