I am looking for a source to purchase synthetic bunk boards
for my pontoon trailer. They have to be 2"x4"x 14'. The lenght
is the catch.Has anyone here used them before with any good
results and Where did you get them? Thanks and Good Day.

if you can't find those, you might try just adding pads to the ones you have..
cabela pads

I replaced my bunk boards last spring with these.
http://www.ultimatebunkboards.com/
its the best thing I could put on my trailer for loading and unloading. Most happy with the product.
I'm not sure they come in that long, may have to email or phone and ask.

Thanks for the info., Got emails sent. Good Day

I put some on my Tracker trailer 7 years ago. They wear great. The only problem I see is that they warp or sag between the bolts so there is more pressure on less area which wears out the carpet quicker and possibly the aluminum on the boat in the contact area.

SE Kansas grass grower