There were some W-3s sold to Korea, few were given to Czech in exchange for their MiG-29s, and few sold around the world. In the end Heliseco (that belongs to PZL Swidnik) is buying back what they can for their own operations.
There is no real reason why to buy W-3, even here in Poland. They cost around 6-8 mln USD a piece... you can buy Bell 412 for that and have more capable aircraft with far better customer service and lower operation costs - and B412 is not really a benchmark today. BTW good luck purchasing new engines for W-3
Sikorsky bought PZL Mieliec because they could (Swidnik was not for sale at that time). Mielec was going to bankrupt soon, and Sikorsky paid all its debts + some. Situation with PZL Swidnik is totally different. And apparently it doesn't matter who will buy it now - what matters is who will have it in 5 years. Aero buying it and then selling to AW is very probable.