Replacement o-ring for Apeks DS-4

[King Kong Matt]

Does anyone know (a) what specific size o-ring is required for a DS-4 and (b) a source for such o-rings?

I had heard that Apeks uses non-standard DIN sizes.

All help appreciated. Thanks in advance.

 

[FFMDiver]

http://www.watersafetyshop.com/820251.html
http://www.deepstop.de/catalog/product_info.php?products_id=167&language=en
http://66.225.239.89/~zeagle/1/index.php?main_page=product_info&products_id=870

 

[King Kong Matt]

Thanks. Those don't seem like the right kits for a DS-4, though (unless I am mistaken).

Does anyone else know? C'mon I know tons of you dive DS-4s...