Saturated foam in filter door

[mik63]

I have a Hot Springs Vanguard; the 2 small foam pieces in the filter door are completely saturated and do not float anymore.
I am looking for the appropriate material to replace them; I have not been able to find those in the hot springs spare parts.
Any suggestion?

Thanks !

[Kev B]

backyardplus.com has a parts finder for your hot tub when you enter the serial number, if it's not there, it is nowhere.