You might consider growing a Bramley's Seedling yourself. I found a scion for sale at
Queener Farm. Unfortunately they don't also sell a rootstock to go with it. You can find rootstocks sold singly at
Cummins Nursery. I'd suggest if you've never grafted before to order 2 or 3 of each item. If you don't have room for more than one tree plant them in the same hole Hopefully you'll have to worry about what to with the excess.
If you've never grafted before there's plenty of places on the internet to help you get started including at Queener Farm above or at
Penn State The graft I suggest is the Whip an Tongue graft under Bench Grafting. I use a retractable safety knife, and ordered a roll of grafting tape on ebay. Never used wax. I made a finger protector by cutting the bottom off a half gallon plastic milk jug. I;ve found it's important to do the graft as soon as you have both the scions and rootstocks and then let it heal for 3 weeks. Keep the roots slightly damp in shredded paper or peat. I then put mine in the ground in it's permanent position. Fence for deer, pets and mower protection.
Or I've found two possible sources for a tree. One at
Trees of Antiquity. The other at
Orange Pippin Trees. That's the US site not the UK site. Trees of Antiquity seems to not be taking orders ( in November ). I found a different variety that was out of stock and they told you. Any other variety I tried gives the unresponsive result.