hello

hello all, i have what i think is an A 833 4 speed in my car, know it not original etc as has A body tailpiece , the input shaft is 18 spline, is this rare? i dont know if it just the input shat thats been swapped,if i get any casting numbers can anyone id the trans please? i want to get a rebuild kit for it, are parts like the detent and cams still available? cheers in advance, nathan.