People install bridge pickups without changing the neck pickup all the time, most likely because they don't use the neck pickup very much or they are happy with it for what they use it for. I changed neck and bridge on my SG because I didn't like either (especially the neck pickup), but some people leave one or the other as is. You can buy them separately too and mix them up, I have a neck and bridge from different sets but I consulted with BKP first to check that would work in my guitar.
With the Telecaster there are special pickups just for that model. Besides the ones with humbuckers in the telecasters are quite similar, the main differences between maple versus rosewood fingerboards. Apparently some of them are optimized for one or the other but this doesn't seem to be as much of a factor in the hotter ones.
Here's the page where you will find information on the different pickups. You might be interested in the Boss or Piledriver pickups.
https://bareknucklepickups.co.uk/main/pickups.php?cat=telesHere's the page where you can find pricing and order the pickups:
https://www.bareknucklepickups.co.uk/shop/index.php?main_page=index&cPath=2&zenid=20b0c8140034bc3e415335fa9cefa71eYou'll find that you have a number of options. I would check in with BKP as to whether these suit you. On single coil sets you have the option of uncovered or covered (with various covers) neck pickups, standard or RW/RP polarity, 'aging' of the neck pickup (to match an older guitar), and 4-way wiring on the neck pickup.
The pickup prices for neck, bridge, and set are on the site. Sets work out cheaper, in part because you get one box, with one set of strings, one pick, etc. If you bought them individually you get two lots of everything.
If you are located outside of the EU the 20% VAT is deducted from the price (as you are exempt). You will however be responsible for any taxes your own government might charge you (this does not happen in Australia, but other places will differ).
Anyway everything is on the site somewhere. There are also FAQs for all of this. Have a look around and listen to the clips. You can also find stuff on Youtube, like this video of a tuned down Tele playing metal through a 6505+ 112 combo and what looks like a 112 Orange cab connected to it as well
http://www.youtube.com/watch?v=3GkBLyIzKjs