Ensuring the Yamaha team still had something to smile about, victory at Brno marks Foret's 12th career Supersport triumph, although it is his first win in over a year.
A slightly disappointed West had to make do with second position, a great performance on a day when the Honda CBR600RR didn't seem a match for Yamaha or Kawasaki.
Lascorz held on for the final podium position, just edging out stalwart team-mate Fujiwara. Although not quite the win either rider had been hoping for as they entered the final lap, third and fourth marks Kawasaki's best combined Supersport performance for more than two years.
Well behind the fight for victory, Laverty will be frustrated at not being able to take full advantage of Crutchlow's retirement, but 11 points for fifth place still represents a significant inroad at the end of what has been a tricky weekend for the Parkalgar Honda rider.
Beyond the leaders, Sheridan Morais put in a remarkable performance on his World Supersport debut, the South African finishing sixth for the Yamaha YZF team after taking on, and beating, Massimo Roccoli and Kenan Sofuoglu in a straight fight.
The former Superstock front runner even managed to get the better of Garry McCoy in the latter stages, the Triumph rider keeping the points ticking over in eighth, behind Roccoli, while Sofuoglu had to persevere with ninth having made minimal progress from his 14th place starting position.
By contrast, Andrew Pitt's rise through the ranks was more impressive, going from 24th to tenth, although it wasn't enough for him to retain his WSS crown, the 100 point deficit to Crutchlow now ensuring there will be no back-to-back title win this year.
Elsewhere, Michael Laverty scored his first points for the Echo CRS Honda team in 13th position, behind Barry Veneman and Danilo Dell'Omo, while Gianluca Nannelli and Jesco Gunther completed the top 15.