Is there any passive component holder similar to a fuse holder?
You could try using female header pins. It's not exactly what they are designed for, but as long as the legs of the passive components are thick enough, it should do for testing. I found these on Digi-Key: https://www.digikey.com.au/product-detail/en/sullins-connector-solutions/PPTC021LFBN-RC/S7000-ND/810142