what about Sam Jamieson was Freeman. I have never used her, she is doing some fittings at Tack a holics soon which is in the Upwell area. Tack a holics are on Facebook.
Mark Fisher's wife is training under him to become a Master Saddler. If she does home visits, her waiting list might be shorter. Or you could travel up to their yard at Leverington to get seen more quickly.
http://www.juddpurssaddlery-eastanglia.co.uk/ These guys come out to my yard and from what I have seen they are good, no hard sell, good service, much better than Martin Wilkinson, who came to reassess a saddle, took it away for restuffing, sent it back in a box with no offer of fitting it on return and unsurprisingly it didn't fit, actually dropped you worse than it had done before and added a whole load of extras onto the bill!