did shop let you know what state the bushes where in, not sure what mileage is on your bike but did seals and bushes on mine last month as had a slight seep of oil on left side leg, decided to change bushes at same time as mileage on mine at time was 46k, though to be honest the teflon coating of bushes was still in good order and could be down to changing fork oil every 15k miles..also could worth checking that your fork oil levels are correct compression/rebound/preload are matching on each side so not putting any extra strain to leaking side, though that all depends how much trust you have in the shop doing the work for you..also it is the seal that is leaking is and not the allen bolt at bottom of fork leg, if it is the bottom allen bolt then be new copper washer required for it, though I have got by many times by giving that particular copper washer a little rub with emery paper and a little smear of gasket sealant and no problems, manual states new copper washer should be fitted each time but each to their own on that one.
also have an old cx500 that was like yourself blowing the seal on one side on the 3rd set of seals I put in and changed the bushes at same time which cured the problem..so could be worth asking the shop if they remember what state the bushes where in on yours, though before you go looking for another fork leg you may as well strip it down and have a look for yourself, sure you find help on here if you get stuck and if you do need new bushes they are not as much as a fork leg, also check what make of seals go in .. worth getting some decent ones as some of the cheaper ones use a harder type of rubber which does not make such a good seal, also giving the fork stanction a rub with a bit of kitchen foil dipped in water helps clear any sharp edges the fork stanction may have.