what gear/ transmission oil for aerox 100

what gear oil do i use for a yamaha aerox 100. the service manual says

"transmission oil SAE 85W/140 TYPE SE"

now i can't find this anywhere and it seems abit too thick for a scooter gearbox

i have found the following

there are 3 that i have found

Silkolene Scooter Gear Oil Transmission 80W-90 - 125ml for £6.50

Shell Motorcycle Gear Transmission Oil 80w/90 1 ltr for £4.98

putoline SCOOTER GEAR OIL 75W/90 125ML 125ml for £5.50

which shall i get? the shell transmission oil seems cheap at £4.98 for 1 litre

any help would be really appreciated