I've just phoned Robert Saunders Tents, at the number given on the 'contact us' section of the site, and spoken to Bob Saunders. He says he has not retired and is still making tents, though I got the impression it may be 'to order' only.
Yep - I phoned him a few weeks back - the model I wanted isn't generally available at the moment, but he said that he would make one when the fabric arrived if a deposit was sent - he was doing a batch of 15 for a school/DoE group.
i love if he would make one as perfect tent for us, i have 2 small children to camp with, good quality is all weather, and for the price!!! cant be beat!
If I knew you sere willing to spend more I'd have suggested a Hilleberg Saivo (well, maybe not that much more...). Easier to put up, more space and better ventilation.