Other Help needed with Jager EVO

I recently came into possession of a Jager EVO .22 PCP. it is missing the fill adapter and the pellet tray/loading sled.

I have a friend who may be able to make a new pellet tray as he has a CNC, but the main issue is the fill adapter.

I assume that since this is an orphan design that the possibility of a different make or model fitting is non-existent.

This particular model is set up with a left handed bolt which is what interested me.

My only other air rifles are Walther LG 400 in .177 and a Sheridan Blue Streak in .20.

Is there an engineering diagram that I can take to a machinist and have a fill adapter fabricated?