The OP linked where he got all his lines and fittings. Seems like you have 2 options....1) get the bsp to jic adapter, but then you must find a 120* bend line (or fitting since it sounds like you already have the line), or 2) get the 42dd bsp to 1/8npt adapter, then find a 1/8npt to -4AN adapter (easy to find on ebay). I already have the bsp to 1/8npt adapter so I'm just gonna buy a 45* 1/8npt to -4an adapter and run a 90* line since they are easier to find preassembled. good luck

 

I have an extra, brand new 3/8 BSPT -1/4 JIC fitting, PM me if you want to buy it.