I've tried ordering that vacuum advance, and it is no longer available.
Even if you go with the Pertronix system, you still need the vacuum advance.
I have only heard rumors about the universal Pertronics system, don't know if it works. I have talked to Pertronics personally, and they said they didn't have anything that would work on our distributors. But, they are only about 30 miles from me. Some day I plan on taking a distributor to them and having them build an electonic ignition kit for the water proof distributor.
I might have an extra vacuum advance that you could have rebuilt. If you're interested, contact me.