Hi,
You can rest assured that none of our open SFP equipment (such as our IES101GP2SFW) have any restriction towards any particular chipset ID or firmware, allowing you to use any MSA-capable SFP of your choice. As long as the speed matches (IES101GP2SFW uses Gigabit, as well as the 10056(H)-ST), it will be compatible.
As for availability, I would recommend you to click on the “Buy from Reseller or Distributor” button above the price of an item. This should show you a list of all of our Resellers and Distributors for Europe for that particular product. You’ll want to make sure that “Europe” is selected on the top-left of our web site in order to have the proper list. Concerning stocks, it shouldn’t be an issue as we have stock for Europe should your selected Distributor or Reseller not have any.
I hope this helps! Please do not hesitate to respond should you require any further assistance.
Emmanuel B.