Idoubt SIGwill be in much of a hurry to carry ARFs again after this last fiasco. That said I do not begrudge you buying one from Nitroplanes. As it sounds you probably would not have bought a kit anyway so it affects SIGnot at all . In the future after you have had a good experience with your SIG designed ARF you may consider kit building and give them a chance.
I think you will be very happy with any SIGkit you choose to build.