Immobliser Dead will xj8 parts fit

hi all i have an XK8 1997 softop that i brought with immobliser problem im the second owner that has tried to get it going so im against it from the start but cant retreve codes comming up with incorect part fitted all numbers from moduels match but i have a feeling it has been reprogramed at some time but messed up
the right moduel set are impossible to find but i have tracked an xk8 kit from the same year bur numbers are miles out my ECM IS LJA1410CA/004 XK8 IS LNG1410BC does any one if this kit will work