Odd size internal doors - help needed, any Chettle Court residents?

Hello, I'm looking to replace one of the bedroom doors in my flat - I am in a 60s built council flat and the door/frames are to a non-standard size, which is making sourcing an off-the-peg example impossible. I'm trying to avoid having one custom-made unless as a last resort on cost grounds, but if needs be I will. The dimension of the door is 1950x760x35mm.

Our building (large red block on Tiverton Road) is built to the same design as Chettle Court, and I was wondering if any tenants/residents of that building lurked around on here that might know where to source replacement doors - or, if in the case of approaching Homes for Haringey, we would be able to have one supplied at reasonable cost (we are tenants of theirs, that is another route I'll try in the working week). Also, as unlikely as this is, if anyone in Chettle Court had an old bedroom door they were looking to get rid of, I'll happily take it off them.

Any advice on this would be gratefully recieved!

Cheers,

Nico