See the last post on this thread:
Isomat single line reefing - Cruising Anarchy - Sailing Anarchy Forums
You can get a dyneema cored line and strip the core where it goes through the reefing cringles.
Alternatively, you can mount a small block to each of the cringles and run your existing line through it, though this may require some re-rigging of the reefing lines since you won't have the lines crossing through the sail.
Isomat single line reefing - Cruising Anarchy - Sailing Anarchy Forums
You can get a dyneema cored line and strip the core where it goes through the reefing cringles.
Alternatively, you can mount a small block to each of the cringles and run your existing line through it, though this may require some re-rigging of the reefing lines since you won't have the lines crossing through the sail.