Example projects, programming and debugging tools to work with Elan EM78 series microcontrollers
As far as programmers go this might be helpfull.

Here is the manual for the UWTR programmer http://www.emc.com.tw/eng/database/Sa2/Gp/Dt/UWTR_UserGuideV1.8.pdf

This document seems to show how to connect the DWTR and some chips http://www.lbmcu.com/docs/ggg.pdf but I am not sure as I don't understand the chineese(?) chars.

Some "universal programmers" claim to work with the circuts you are describing such as http://www.soselectronic.pl/a_info/resource/c/elnec/BeeProgPlus.pdf I can't find that one on ebay, but there are others that make the same claim.