Probably have a rough time...
The tee is probably available or you can possibly use the one from the 86 "Y" hose coming off the compressor housing.
The 90 degree intake elbow is like looking for a diamond in a pile of compost gonna be hard to find that.
Contact spearco see if they have any distributors with any hotair parts left.
May have to fab one using original turbo adapter.
Good luck
Jerry