Some info that may assist. Everything I buy I pay retail, I am in WA. I buy bearings from Statewide Bearings, chain from Chain & Drives.

You don't need any special tools to break chain, just grind the heads off the pins and knock the side plate off with a screwdriver/sharp chisel.

Engine to cutter chain, 06b1 760mm long ( all measurements chain only). You can buy good chain for around $2.50 per foot (comes in 10 foot rolls), I use Hitachi chain at around $4 per foot. 10 foot roll is enough for four mowers.

Cutter to land roll clutch, 415 chain 735mm long. This chain also has a 1/2 link, not included in the above measurement. Land roll clutch to rear roller 415 chain, 477mm long.I use a heavier chain for both (415H), 10 foot box is enough for two mowers.

I use good quality bearings, all are around $10 or less.

Cylinder bearings RLS5 2RS.

Clutch output shaft, 1202 bearing, if you use this bearing the seal on the clutch output shaft is a V20 V ring, you also need a rubber seal on the chassis side of the bearing (35mm OD, 22MM ID). If the engine is in good alignment with the clutch output shaft a 6202 2RS bearing can work well ( my mower ran with a 6202 for 15 years without a problem).

Clutch thrust bearing, to the best of my knowledge original only.

Land roll clutch assy, 6204 2RS, 6003 2RS.

Rear roller, original only to best of my knowledge. I machine sleeves to adapt a 6202 2RS 16mm bore bearing, sleeve dimensions : 34.98mm ID, 38.6MM OD, 11MM wide.

Regards Gino