If you want original mags and don't want to wait around for some "cheap" ones to come around..... you can either call Earl and see if he has some used ones.... not sure on the price of those.... new ones at Earls are more than most other places though.... link to Earl's site
Or you can call WaltherAmerica(S&W) and ask them... last time I ordered some they were $64 per mag and brand new... link to Customerservice info
they are not listed on the webpage but they had them... part # is "WAF64502"
or you can go to gunbroker... and look there (at least 3 listed at this time
If you look close on the Gunbroker listing you will see that the sellers all say those are stock photos and might not reflect the actual mag.....
I had bought one of gunbroker and it looked just like the original Walther P5 mag.... and I had ordered 3 from S&W and they also looked like the original