I am looking for any information on the mounting of TO-220 and TO-247 as
surface mount parts.  An additional complication is that these parts dissipate
a significant amount of heat, in the range of 4-10 Watts, and do to minimal 
airflow over the parts, must therefore be mounted directly onto a cold plate.
This means that the part body will be mounted on the cold plate but the leads
will be gull-wing formed and soldered to a pwb.  See below for a real poor 
depiction of problem.

Has anyone else been faced with this situation and if so how was it overcome?

Thanks for your suggestions in advance.   



______________  formed lead
|TO-220 / 247| ----
--------------     |======
              |     _________________________
 Gasket       |    |          PWB            |
______________|____|_________________________|__________________
                                                                |
                                                                |
                          Cold Plate                            |
                                                                |
                                                                |
                                                                |
________________________________________________________________|


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