I found something interesting:
https://www.intertechnik.com/Shop/Cross-over-parts/Capacitors/Audyn-Cap-Q6/_7045...This cap is cheaper and smaller, metalized polypropylene film capacitor. Can't say which is better, but at least it's smaller and easy to change.
SPECS:
Audiophile MKP capacitor,
Max Power handling : 600 V
Loss Angle Tan: 0.0003 (1 kHz; 20oC)
Tolerance: +/-5%
Connecting leads: Axial, tinned copper, 35mm long.
Operating temperature: -25oC - +85oC