The link in your response regarding Alfa Spid availability shows that Green Heron has a quantity of zero. John KK9A Tony Brock-Fisher K1KP wrote; Green Heron has them listed on their web page. I bought the RAU setup from them a year or two ago. https://www.greenheronengineering.com/product/alfa-spid-rak-with-rt-21-contr oller/ -Tony, K1KP