On the website of the manufacturer Fischer new collet costs $ 275 without shipping.
Original! New! Made in Switzerland.
Fischer PRECISE collet SC40 D0.6  (Sc42), for PRECISE Spindle SC 40 (SC 42)
price for 1 pc. D0.6mm

Ships to Worldwide.
International Airmail Shipping normally takes 12-25 working days for delivery .
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Other diameters available:
Original! Made in Switzerland. NEW!
D0,6 mm
D0,7 mm
D0,8 mm
D0,9 mm
D1,0 mm
D1,3 mm
D1,8 mm
D3,175 mm 1/8

Also available diameters
Made in USSR (CCCP). Not original. New and used.
D1,0 mm
D1,1 mm
D1,2 mm
D1,5 mm
D2,0 mm
D3,15 mm

price depends on the diameter
If you need a different diameter let us know.