There are 2 on Hangar 9's web site in the discontinued section
http://www.hangar-9.com/Products/News.aspx?ProdID=HAN2400C
P-51 1.50/Saito 200Ti Combo $1189.98
&
http://www.hangar-9.com/Products/Support.aspx?ProdID=HAN2400
P-51 Mustang 1.50 w/Retracts ARF $499.99