I started checking to see if there was such an animal as a 25 cal LGU. Not only did I not find if LGU was ever offered in 25 cal - it seems that there are n o LGU or LGVs for sale.
I went out of my way to find a good used, wood stock LGU because I was late to the game myself. It ls one of my favorite guns to shoot. If you come across a used one, buy it. That goes for the LGV and the Terrus as well.
The mold for casting the trigger housing wore out, and Umarex didn't believe there was enough demand for the LGU/LGV series to justify building a new mold.
Blackdiesel, Sorry, the LGV was never made in .25 cal. However, if your guns are 16J and you want to up them to 23J, Hector Medina can hook you up with a spring and custom spring guide. He made a couple for me. Connecticut Custom Airguns - Welcome! (ctcustomairguns.com)