Mopar Cylinder Head Machine shop .... help ..

Some of the equipment I acquired over the years to work on my Mopar heads n cars ... IDL 550 last used 2008 Sioux 650 Valve refacer last used 2009 matching Big box with other tools .. The IDL550 is similar to 750 n 650 models by Van Norman .. Missing some parts to it got lost anyone no if they still make replacement stuff for it Guide stop and seat stop fork are gone .. also need a refresher coarse for me n son to use it again guess getting old memory not what use to be .. 2008 used on a set of 340 X heads 2007 340 aaw j heads .. Need some advice .. 452 heads next month the guides n seats.