TEEL LAB OÜ manufactures various types of trailers. Trailer accessory offering ALTO EP Leaf & Lawn vacuum. STEEL LAB OÜ can be found at http://www.foresteel.eu/

In Finland ALTO products dealers are: Farmikko Oy  http://www.farmikko.fi/ ,   
Jatkone Oy  http://www.jatkone.com/ and Kurikan Hyväkone  Oy  https://hyvakone.com/

In Germany, the ALTO forest machine dealer is  Rohse- Fahrzeugtechnik e.K
More information:    https://www.forsttechnik-rohse.de/

In Lithuania, the ALTO forest machine dealer is UAB "Foresteka" 
More Information:  http://www.foresteka.lt/