Hi, sorry can't help with the 420 parts but Bill the dial face is still available for the 52 in non-totalizer only... not the black plastic/cardboardy pc. or the trim, just the face itself. You can email me if you want, we are a Gasboy distributer and I just called them to make sure, $15.19 plus ship, prices go up at the end of the month.
Good luck to all,
HAGD