Have been using this SMD heatsink for (among others) TO-263 voltage regulators, e.g. LT1963 and LT3015.
https://www.fischerelektronik.de/pim/upload/fischerData/cadpdf/base/fk_244_13_d2_pak.pdf
TO-263 Heatsink, Fischer
Have been using this SMD heatsink for (among others) TO-263 voltage regulators, e.g. LT1963 and LT3015.
https://www.fischerelektronik.de/pim/upload/fischerData/cadpdf/base/fk_244_13_d2_pak.pdf