If you want the ultimate 4:3 Thinkpad, I think this is it: http://www.ebay.com/itm/Custom-IBM-Lenovo-ThinkPad-T60p-T61p...

I won't say most, but 1400x1050 14" was a fairly common config. Standard issue at work at the time.

I'm in the UK.

The ones here tend to be broken.