I guess no one has rescued you on this subject. From what I've read this is a common problem, but I haven't read of a common cure. Some folks install a whole new housing at about $250. I wonder if a Trans-Dapt Remote Filter Set-up would work, this would give you a big spin-on Ford truck filter. just a thought..

'99 Disco II
'95 R.R.C. Lwb (Gone...)
'76 Series III Hybrid 109
'70 Rover 3500S