MaxPower4U got a reaction from
APasz in New loop for 9900k
You can get Barrow 10k sensors from mydiyau's ebay store.
https://www.ebay.com.au/itm/Barrow-G1-4-10K-Temperature-Sensor-Stop-Fitting-TCWD-V1/252377198424?_trkparms=aid%3D777001%26algo%3DDISCO.FEED%26ao%3D1%26asc%3D20160801204525%26meid%3Da569476ac50d4d4aa4dea43dfb86e1c7%26pid%3D100651%26rk%3D1%26rkt%3D1%26%26itm%3D252377198424&_trksid=p2481888.c100651.m4497&_trkparms=pageci%3A4af3d37a-9fae-11e9-9207-74dbd1803ba5|parentrq%3Ac5bd6cbb16b0a4b77c8ab393ff8b9b59|iid%3A1
https://www.vipc.com.au. has them as well, but looks like they are out of stock at the moment.
https://www.vipc.com.au/products/xspc-g1-4-plug-with-10k-sensor
https://www.vipc.com.au/products/xspc-g1-4-inline-10k-sensor