Last time, in 2015, against the Jags, I went through this company, for my game tickets and hotel.
Gullivers Sports Travel | Rugby, Cricket, Motorsport, Golf, Hockey, Supporter Packages, Tours, Travel & Sports Hospitality with tickets (gulliverstravel.co.uk)
Very easy to work with. Plus they did a Saturday night reception at a pub, with a former Bills player. Well, the wife (then girlfriend) and I walked in late, to see Jim Kelly and Thurman Thomas sitting there! Only about 20-30 people showed up, so it was great. They took questions and hung around for a little while so people could get pictures with them.