I acquired a 3 X 5 and a 3 X 6 flex king undercutter and took it all apart for one of the frogs.  So, I have the rest of the machines for parts.  I also have a set of Noble fingers that went on the 3 X 6.  Frogs for 5' blade and the 6' blades (all 6' frogs are SOLD) - $400/each.    Other parts from the frame or rockshaft tubes - Call.  It has 14" rims on it and tires are terrible.  Also have a set of 15" rims and tires for this with 27x9.5x15 size.  Tires are good on this one and ready to use.  All rims are 5 hole with 5 1/2" diameter.  Center hole is large and fits flex king undercutters.   I will be very easy to get along with on the parts you want.  785-698-2403.