Im using a regular surfboard for kitesurfing in waves (a 6'4" firewire alternator) which has a decent amount of rocker.
Can anyone give recommendations for thruster surfboard fins suitable to use with the board, that accounts for the fact its being used with a kite?
Loaded question. If you have a board with loads of rocker I would look at more of a stiff fin to get better upwind drive. If you are just banging around in shallow shore break then I would just get a few cheap honeycomb fin sets, (around 30 bucks a set). For my shallow thrasher this is all that I need. But if the surf is good, than I currently use a lovely set of Futures (Clay Marzo set for the quad, Jon Jon set for the thrusters.) Good thing with kiting is you can tell quickly what will or not work well. With surfing the rides are often so short that it takes a few sessions to really get to know the fin and it's characteristics.