Durst made a punch that would place multiple 1.5mm holes and included the 127mm spacing required for the pins of the L1200 carrier. These punches are rare, but I have seen one or two on Ebay in the last 2 or 3 years.
The Alistar Inglis punch that I've used makes holes about 101.5mm apart. But I think Alistar makes several varieties of his punches, so he may have one with the hole spacing you need. Or he may be willing to make a punch with the exact spacing you need. Give him a call and talk about it.
Another option is Jens Jensen in Hillsboro, Oregon (
Durst-Pro-USA). He makes a small punch, and he may have one with the correct spacing for the L1200. I've only seen his ads, but check his site or give him a call.