Here is what I'd be looking at:
The Mantus Anchors Universal Mooring Bridle Snubber System offers enhanced boat stability and shock absorption, reducing strain on your windlass and deck during rough conditions.
www.westmarine.com
I'm not sure you could build your own for under $200 including splices, chafe protection an 316 hardware. You would probably want to splice in a Flag pennant depending on local custom.
We used to drop the loop(s) to the bottom to minimize growth and mess on deck from them. In only 8' of water it made a difference. So the flag pennant would be spliced to near one of the loops and long enough to reach the bottom so you can grab the flag and pull the pennant up to retrieve a loop to secure to the cleat. Other means to do the same are used in different locales.
Some posters on this site are against 3 strand nylon and I won't disagree but I've always used such for mooring, anchor and dock lines without incident.
Here is Polyester/Nylon mix. I think there is only one loop with this but I'm not sure and no hardware:
The Mantus Anchors Universal Mooring Bridle Snubber System offers enhanced boat stability and shock absorption, reducing strain on your windlass and deck during rough conditions.
www.westmarine.com
I would size up one step if your mooring area is open.
