Where To Get Speaker Water Guard Rings?

[ameyam]

Can someone please tell me where to get the speaker water rings frim. They are meant to protect speakers from water in the door cavity. I have 2 installed on the rear doors and they work nicely but the company making them is out of business
Http://www.team-bhp.com/forum/car-entertainment/141936-waterguard-speaker-rings-audio-sympro.html