UMI stands for UNITED MUSICAL INSTRUMENTS. They were the manufacturers of Armstrong, Artley, Benge, Conn, King, and UMI bramds. This company later became Conn Musical Instruments and then merged with Selmer Co. It is now known as Conn-Selmer Inc.

I assume we are referring to Leblanc (not Lelanc) saxophones. These saxophones are produced in Kenosha and Elkhorn Wisconsin by Leblanc, Inc., a division of Conn-Selmer, Inc.

If you are referring to Trumpets in today's time, they are made in a few different places. Trumpets made by Conn Selmer Inc (Benge, Bach, King, Conn, ect...) are made in Elkhart, IN.

The Conn brand is part of the larger Conn-Selmer group and is used to label brass instruments such as cornets, trombones, tubas and sousaphones. The wider Conn-Selmer group also produces percussion, woodwind and string instruments.

Amazon lists several Selmer musical instruments on its website. Selmer musical instruments can also be available from the Conn-selmer website or the manufacturer.