Can anyone recommend a online shop where one can buy good quality 525 sprockets that fits the Tenere?

I have until now bought from OTR - but not 100 % satisfied with the longevity of those sprockets.

Thanks in advance!

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Suzuki AC 50 -78 owned from 83 to 84
Kawasaki Kh 100 Es 81 owned from 84 to 86
Honda Transalp Xlv 600 -97 owned from 01 to 05
Honda Nx 650 Dominator -98 owned from 07 to 10
Triumph Tiger 955 i -01 owned from 10 to 13
Yamaha XT660Z Tenere ABS -11 owned from 2013 and present bike.
Honda Crf250L -12 my bike in Thailand.