I find their website (which they perhaps only had constructed after much pulling of hair and gnashing of teeth: one hopes so) of enormous interest when browsing online.  If they truly are the last bastion in the USA (or, at least, in their part of it) I for one am going to pay attention: especially to their 'vintage' offerings.  It's possible, with some thought and imagination (and input from enthusiastic other posters, like Alvey) to track down very similar items here in the UK, thus avoiding excessive costs (not always the fault of O'Connell's themselves of course). 

I would very much like to see a John Simons A-Z.  It might surprise some of us.