i took an old webber afterburner to a boardshaper/repairer, took fcs fins out and put glass ones in, fixed a huuge ding, and put boxes in for straps. $250 from memory, rode it for two seasons, bloody thing just wont die.
more to the point, i reckon for boxes only someone would do them for $100 -$150 maybe "professional" job so you'll get a season or two out of them.
dont listen to the strapless guys, they are always harping on about the benefits of riding unstrapped
oh sht i hope i havent reignited the straps debate again.
straps or not, just smack some lips maaan