New Vs. Older MSD 6 boxes

I have several used old style analog MSD 6 boxes. They all work. I have one MSD 7 analog that I bought new about 1976. Had to be ordered special for the 6 cyl. It failed sometime in around 2005. I called MSD about getting it repaired and was told they didn't have and couldn't get parts to repair it. A member on one of the web sites I go to offered to take a look at it. He was able to replace one transistor and it has been fine since then. Cost me $25.00 including shipping. Not a fan of MSD. They didn't even want to look at it.