This is my own, simple creation of heat sink Fan Duct. It's an upgrade from the stock 4010 blower to a 5015 blower, to prevent heat creep on Sovol SV07/SV07Plus and maybe SV06/SV06Plus.
I printed the duct in ABS, but PETG or maybe PLA should work fine.
The author marked this model as their own original creation.