They have a general statement at the bottom of the Kit Prices and Lead Times page of 6 months for non-Thunderbolt engines and 12 months for Thunderbolt engines.
I ordered my FWF kit last October and was told there was a 6 month delay due exhaust and control cables. Called Vans 2 weeks ago to ask them to ship what they had and put the rest on backorder. The kit has arrived already including the exhaust with only the control cables missing. This is for Thunderbolt A3B6 engine.