I would put the word out on FB (high performance boating)and outboard-mafia.you could also contact places like Diamond Marine in Ft Lauderdale.maybey post odn Screamandfly.com
Depends what kind of 2.5 your looking for, racing 260’s and 280’s will be harder to find, 200 fishing 2.5’s much easier, also depends on what mid you want, offshores are harder to find and will set you back some additional $$ bass mids much easier.