Sorry to revive an old thread but does anyone have any more info on how much it would cost to buy the synchro kit and have it installed?

I've been taking off in 2nd most of the time to avoid first gear but thought I'd start off in 1st for a few days to see if it still popped out of gear. So far, it's popped out 1st gear 2 or 3 times today alone. I've never had this problem with any of the other manual trans cars I've owned/driven (lots), so that's why I'm concerned.