Foodsaver by Tilia Vacupack foam pressure pad.

[Gage]

The foam pressure pad on my food saver has worn out, there are indents in the middle and the manual specifies that this means they need to be replaced. I found one obscure sight that sells them for $20 which seems ridiculous for two pieces of foam. Has anyone been able to replace these themselves with high density foam or found parts at a reasonable price? Thank you