If you are looking to upgrade your Telecaster neck pickup, you are in good luck. Many great sounding models are out there that offer not only a high-quality tone but they do so at a pretty reasonable price.
Nowadays, between digital modeling and overall great engineering, you can make virtually any guitar sound like just about any other guitar. Except, you cannot make any guitar really sound like a Telecaster. You can try, but it will never really quite smell right.