To accurately simulate reality in case of passive speaker crossovers there is no possibility to ignore coils' serial resistance marked in simulators as LSR (Coil Serial Resistance).
Regarding air coils you can use one of the following calculators but naturally, I can not guarantee correct results in your cases.
http://www.pronine.ca/multind.htm
http://www.circuits.dk/calculator_multi_layer_aircore.htm
http://www.tesla-institute.com/!app/sim/acic.php
https://www.diyaudioandvideo.com/Calculator/AirCoreInductorDesigner/
http://www.colomar.com/Shavano/inductor_info.html
You can also looking for your own choice for example by this site:
http://educypedia.karadimov.info/electronics/electroniccalculatorcoils.htm
In case of capacitors real serial resistance CSR usually is not so important for accuracy of simulations but for different cases you can put value of CSR into your projects. If you do not know this value you can assume 0.01 - 0.1 Ω.
In case of resistors simply use non-inductive resistors.
Simulators