Brake lines source

I've seen plenty of trailer brake line loops, seems a far quicker and simpler way of doing this...

Not disagreeing with regards to the OP. You need to remember that the people contributing to this site compromise only 5-10% of its readership (maybe less these days?). Cutting and flaring a line would be the proper advice most of the time- though adding some spirals may be ok if you are lacking the tools or skills to flare.

Hey Tim,
   Reading the OP's comments I think the best plan for him is to get pre made
lengths of brake line, make a couple easy bends and install. Then wait for
his question on bleeding trailer brakes.

NAPA Has it in stock. One hour job - pretty much.

Trouble is Tim is that if you don't know where to find brake line how are you going to have the expertise to cut to length and double flare? Marks method seems to be alright,my Phoenix was done the same

I installed new lines on my car trailer.   As I recall looking at my boat they buy a length of line with both ends formed. The line on my boat was about 2 feet longer than needed.
The manufacturer just made small loops to use up the length not needed so I copied that and did the same to my car trailer as I replaced the lines. Worked out fine and looks good.
I used a spray paint can/ rattle type spray can. They are about 3 inches in diameter which is about the diameter of the factory boat loops. I carefully looped the brake line around the can about 4 loops used up the extra line length. Then hooked everything up.
It sounds like a funky fix but this is exactly what was done on my factory boat trailer line.
I think Napa had to order the line for me 12" 1/8 inch brake line but I got it the same day I ordered it. Worked out well and easy. There are tools available for forming the line to fit your trailer without kinking the line which would ruin it. The tools work well for the small bends but not for the loops needed to set length.

If you know what you need, you can also try:

www.etrailer.com

I've had good service from them.

JQ

Reggie, you'll need to measure the line from the actuator back to the t-fitting. Once you know the length you need you can easily find a replacement part from most auto/trailer part retailers. I recommend visiting etrailer.com since they have a lot of good reference material to get you headed in the right direction.

Automotive supply store.