I've wanted Audyn True Copper Max Caps for sometime but always balked at the price from Parts Connexion.
Happily, it looks like they are available for much less when ordered directly from Intertechnik in Germany.
Here are the comparative prices in $Canadian from Intertechnik and from P C for 2 x 3.3 uF and 2 x 0.1 uF True Copper Max Caps rated 630 VDC (for a Stereomour II 2A3):
P C : $763, delivered to my door
Intertechnik : $492, excluding Canada duties and taxes
Using a Government of Canada Duties and Taxes estimator, I calculated that I will have to pay less than $100 for duties and taxes. So, all-in, no more than $600 versus $763. I suspect the savings would be comparable if ordering from the U.S.
Edit: I should add that the price from Intertechnik is also 60 Euro cheaper than Hifi Collective in the UK.
Audyn's website: intertechnik (dot) com
I will post my actual final cost when I receive delivery.