Just got the following reply from Sig:

Dear Bob,

Thank you for your note. We had expected to have Sukhoi SU31 ARF airplanes available this month, but due to the dock workers strike in California, our shipment has been delayed. At the present time, we are uncertain as to the exact delivery date. Much is dependent on the time
it takes to catch up from the back log caused by the work stoppage. We sincerely regret this delay, and are doing everything in our power to
get the Sukhoi to the states as quickly as possible.

Best regards,
Larry King
Vice President, Marketing
SIG Manufacturing Company