Well try not to walk Alan as it is a bit far!!! I take you are going independently? You can book transfers through this site or do a google search for other companies. Also the cheaper option is to catch a bus from Sofia to Bansko I think that takes around 4 hours again google it and you will get the bus timetables. Failing that plenty of taxis at Sofia just agree on price before you go.
i'm looking to book a taxi as well i just want a guarantee that we will be picked up on the return journey!
can anyone not recommend a good taxi company that they have used before?
Alan if you get onto any good sites could you let me know please?