Find round filter for Philips AC800 Air Cleaner? I own a small Philips AC 800 electronic air cleaner. The...

I own a small Philips AC 800 electronic air cleaner.
The filters are disk shaped, just about 5in diameter by 3/4 inch thick.
The filters are Model ACF3.
They are not available contained by any store nearby. The product is not shown on the Philips web site.
I be told it was obsolete but it be still manufactured and sold in 1995.
Any help appreciated.
Filters are white, beside black carbon side.
Is pink the pink styroam insulation ok for...
Answers:    From what are they made ? Can you reconstruct one?