I just posted my experience with lubes other than Dow 111.
I did a bit of research about a year ago into food safe lubes. It's a relatively new field. Big demand for food safe lubes in the food manufacturing/distribution sector.
There a several rating categories from no contact with food, incidental food contact to direct food contact. So far Dow 111 is the only readily available direct contact lube I know of. There are other lubes I found but they were rated for either incidental or no food contract. For lubing piston seals and walls the Dow 111 would be safest.
I couldn't find Dow 111 either so I thought trying other lubes would work just as good. Incidental food contact rating was a compromise for availability. I don't know what your Peppina's like by my Cremina is a brass cylinder, brass piston and fit with new stock seals. I've tried only 3 other lubricants- olive oil, a mineral oil lube and a teflon zinc oxide lube- and none other than the Dow 111 lubricates as well, sticks as well or resists washing out on my Cremina. So, not only is Dow 111 rated higher for food contact it also works better than anything else I've tried. Personally I would do what I could to find some Dow 111. It shouldn't be that hard to find.