Timmay,
We are in the process of developing the first mainline specifically for winching. The rope is 1/8" dyneema with coating; it will glow. The coating is to protect against abraision, and the glow is to help find the line when winching in the surf. This rope will come in 1200' reels, and will cost .25 per foot.
Email me if you have further questions, or you can pre order. Our first reels will be very limited in supply, and about 1/2 have already been purchased.
Thanks,
Ken Land
www.bulletlines.com Bullet Lines