Stephen Lachter. I posted some of my shirts in "Folded Up Shirt Porn" thread.
I have no experience with Budd's shirts, however the customer service they provided to me was exemplary. They are one of the only places I could find that carry a black satin 3-button formal waistcoat: http://www.buddshirts.co.uk/black-satin-waistcoat.html
When I emailed them about measurements they responded extremely promptly with measurements including pictures of the measuring process so I could get an accurate idea of the size I need. When I emailed them back about the inability to order XXL (I'm sure that is not a common size, for an already uncommon item) they were able to secure inventory and emailed me back about availability on their website. Great! Even with the time difference they responded within hours.