Hello there,
I recognize that I'm waaay late to the party, but having just acquired my first 944 (an '87 951 that needs some TLC in the engine bay), I'm playing a lot of catch-up. I've found old posts about your 4/5 port vacuum manifolds and wanted to see if you had any available, or if you'd consider doing another run of them. If not, no worries; I figured it couldn't hurt to ask.
Let me know, and thanks regardless of the response.
Stuart