Here you go Ed.
These look really nice but seem to be for smaller excavators from what i can see/read.
From Frank, taken from Facebook:
" Breite 57mm, 8mm Kettenteilung, und 4mm Bolzen. Wenn noch Fragen sind, meld Dich!"
"In kürze werden die Kettenglieder verfügbar sein. Kettenbreite 57mm, 4mm Kettenbolzen mit 8er Teilung (16mm Kettenbolzenabstand). Zum Preis von je 3,80 Euro inkl. dem passenden Kettenbolzen.
English: "Width 57mm, 8mm chain pitch, and 4mm bolt. Meld If there are any questions, you!"
"In brief, the chain links will be available. Chain width 57mm, 4mm chain bolts with 8 mm pitch (16mm link pin spacing). At a price of 3.80 euros each including the appropriate link pins.