The filter?
Buy a new one.
Now something has cropped up since I last had to buy one. Apparently there are cylindrical ones and others that have flat end or somehting like that. I don't know why there are different versions. Find one like the one that's on there. Why experiment/
As far as the tank, I've not had to go that far. My friend brought that thanls from his '60 Sprite and a later 60s SAAB to a place in Yeadon or Upper Darby. One needed patching too. They're not there now - so I'm no help at all there.