Hello Stefarms,
Yes you are right, the Swiss pattern model is referred as 29/70. The "German" model,similar to the 06, model is referred ad 06/73.
You are right also concerning the second point. The 06/73 production was less important than the 29/70 one. Therefore it is easier to find out 29/70 models.
If you want to see some Mauser Parabellum other than the 29/70 and 06/73, you can have a look at my web site and click on the "Mauser Parabelum Area":
www.lugerlp08.com
Have fun,
Mauro