Still Kicking
Contributor
You might want to look into using some bungee cord (repurposed luggage strap) to create a DIY strap. Attachment varies depending on the fin so you might have to get a little creative.
If you are able to find a stainless spring replacement, make sure it has an internal static line to prevent overstretching.
If you are able to find a stainless spring replacement, make sure it has an internal static line to prevent overstretching.