Heater Core Hose Insulator/Seal

[Ken B]

I am working on the heater core replacement, all going well until the hose insulator/ gasket tore going back together, any ideas where I can get a replacement.
It goes around the inlet and outlet pipes to help insulate/seal to the firewall.
thanks in advance

 

[AuroraGirl]

I am working on the heater core replacement, all going well until the hose insulator/ gasket tore going back together, any ideas where I can get a replacement.
It goes around the inlet and outlet pipes to help insulate/seal to the firewall.
thanks in advance

I would assume a heat tolerable foam would be good
otherwise firewall heat batting maybe cut nicely to support and seal it

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From pics I cant really tell what squares do

heres what my car had

 

[Ken B]

thanks, i wouldnt have thought they were hard to come by....