The hotel in Bansko is Devonshire Lodge, I think I met Glynis' husband last year when I was there. Would've like to have gone there myself this year, website looks great - just do a google search for it
Be carefull to check the small print though. Some companys wont sell you ski packs on cheap late deals. And geting skis/boots lift pass etc in resort can be expensive.
we got flights with lastminute.com for last boxing day, manchester-sofia for £135 each, inc taxes, meal etc. wo could of got a weeks accomodation but it was in bansko for about an extra £50 each
phone them though, they dont list everything on line