The design is the features of shape, configuration, pattern and ornament of the HEAT-EXCHANGER FOR ELECTRONIC COMPONENT HEAT SINK shown in the drawings. Drawings of the design are included. FIG. 1 is a front, bottom and left side perspective view of a HEAT-EXCHANGER FOR ELECTRONIC COMPONENT HEAT SINK showing a first variant of the design; FIG. 2 is a front elevational view thereof; FIG. 3 is a rear elevational view thereof; FIG. 4 is a right side elevational view thereof; FIG. 5 is a left side elevational view thereof; FIG. 6 is a top plan view thereof, a bottom plan view is a mirror image thereof; FIG. 7 is a cross-sectional view thereof taken along a line 7-7 in FIG. 2; FIG. 8 is an enlarged cross-sectional view thereof shown in FIG. 7; FIG. 9 is an enlarged fragmented front view thereof shown in FIG. 2; and FIG. 10 is an enlarged fragmented rear view thereof shown in FIG. 3. FIG. 11 is a front, bottom and left side perspective view of a HEAT-EXCHANGER FOR ELECTRONIC COMPONENT HEAT SINK showing a second variant of the design; FIG. 12 is a front elevational view thereof; FIG. 13 is a rear elevational view thereof; FIG. 14 is a right side elevational view thereof; FIG. 15 is a left side elevational view thereof; FIG. 16 is a top plan view thereof, a bottom plan view is a mirror image thereof; FIG. 17 is a cross-sectional view thereof taken along a line 17-17 in FIG. 12; FIG. 18 is an enlarged cross-sectional view thereof shown in FIG. 17; FIG. 19 is an enlarged fragmented front view thereof shown in FIG. 12; and FIG. 20 is an enlarged fragmented rear view thereof shown in FIG. 13. FIG. 21 is a front, bottom and left side perspective view of a HEAT-EXCHANGER FOR ELECTRONIC COMPONENT HEAT SINK showing a third variant of the design; FIG. 22 is a front elevational view thereof; FIG. 23 is a rear elevational view thereof; FIG. 24 is a right side elevational view thereof; FIG. 25 is a left side elevational view thereof; FIG. 26 is a top plan view thereof, a bottom plan view is a mirror image thereof; FIG. 27 is a cross-sectional view thereof taken along a line 27-27 in FIG. 22; FIG. 28 is an enlarged cross-sectional view thereof shown in FIG. 27; FIG. 29 is an enlarged fragmented front view thereof shown in FIG. 22; and FIG. 30 is an enlarged fragmented rear view shown in FIG. 23.