Extract WSPs from Central Admin Solution Management

You can extract wsps from Central Admin Solution Management using PowerShell if you don't have binary or Setup exe.

$wsps = "Solution1.wsp;Solution2.wsp"
$path = "D:\Wsps\"

$farm = Get-SPFarm
$wspNames = $wsps.split(";",[StringSplitOptions]'RemoveEmptyEntries')
foreach($wspName in $wspNames) {
$file = $farm.Solutions.Item($wspName).SolutionFile
$file.SaveAs($path+$wspName)
Write-Host "Solution File extracted to this location " + $path$wspName
 }