Joined: Jul 2015
Posts: 7,370
Likes: 3,218
From: NW Oregon
Bikes: 1982 Trek 930R Custom, '91 Diamondback Ascent w/ XT, XTR updates, Fuji Team Pro CF road flyer, Specialized Sirrus Gravel Convert, '09 Comencal Meta 5.5 XC, '02 Marin MBX500, '84 Gitane Criterium bike
i just searched: "50-39-30 triple crankset" and a long list of them came up.
just get the correct BB to match the crankset, and install it... minor adjustment of the front der. may be needed, but it might even work, as is!
personally, i prefer Shimano HT2 cranksets over FSA stuff anyway.
what made you assume that you'd need an entire new group, anyway?
what parts are on the bike now?