In the world I retired from (EPG) the MFG's are trying to fuck over the end user just as hard as the service side. In Some Automatic Transfer switches the coil clearing contacts are not available for sale, those MFG's will tell you its to dangerous to replace them but they will sell you a complete mechanism at 35-38% off. Most will go that route as the word dangerous, and 35-38% off chews on them. Replacement contacts,... CAN,... be had under a different part number from the parts OEM. The replacement set has a 600Vac 25 amp rating vs the installed of 370 & 15 amp.
The complete mech my cost on a 3 pole 400 amp was $2,300.00 and went up depending amp rating & pole count. The replacement contacts I used were $25.00 for a set of 10 (lowest ct the oem would sell) on site labor was less than 20 minutes. Which to replace the mech took about 1 hr, not counting the unhook, lug up, unlug, and rehook up the mech, as most could not have the power of for more than 2-3 minutes, depending venue. In a Hospital or such the charge to change a complete mech could get rich real quick, vs just R&R'ing the contacts.
The closer most of us got to retirement the more & more, we started seeing this type of B/S pop up. It had been happening for years with Primemover (engine) crap, Most of us were of the mind the MFG's want to do away with service in general, and if your xyz broke just buy a new one. Course they want they old one for "Scrap",....Scrap yea right, install 2 bucks worth of parts & sell in on the secondary market.