Getting from San Jose to Mal Pais

Hey guys, I ended up booking a ticket to Costa Rica again this year. I got a pretty good deal on my ticket (700$US, down 200$ from last year). Anyhow, this year i'll be flying into San Jose instead of Liberia (Liberia was convenient but the airline ticket is 400$ than SJO this year). I arrive at 8pm and I'd like to get to the surf ASAP. I plan on probably heading directly to Mal Pais, since that was my favorite place last year (and I surfed nearly every spot in Guanacaste). Anyway, does anyone know how much a shuttle bus will cost and how long it will take (A schedule wouldn't be bad either).