Modern or vintage type?
If it is modern, a genuine 3135 date wheel turns in the correct direction to use on an ETA but with a 2824 there is not much room between the dw overlay and dial. ETA 2836/46 is not as bad because there is more room when the day of the week disc is removed. If you space the dial up a little bit somehow on an ETA 2824 to make room for a dwo, the hands may be too close to the dial. Then you will need taller sweep second pinion, CP, and hour wheel.
Rlx 15xx and 30xx date wheels turn the wrong way for an ETA.
Good silver/black vintage types with open 6/9 are hard to find but white/black is not as bad.
One of the best silver/black:
eBay item number 123941307445
Hour wheel, CP etc info (2824 and 2836/46 can use same parts):
http://cgi.julesborel.com/cgi-bin/matcgi2?ref=ETA+2824&submit=Search