Please could someone in the know provide details of the preferred manufacturers and suppliers for portable air stairs for jet aircraft.

I've been tasked with sourcing portable air stairs, but don't have a clue where to start.

We use these

R H Phillips Engineering Ltd. Aircraft Towbars,Passenger Baggage Trolleys, Fabrication and Welding (http://www.rhphillips.co.uk/)

Many thanks for that, I've e-mailed them now to see if they can assist.