I would agree on Lease Quiet Nights after it's had some time to age. I had it before Penzance and when I finally got my hands on some Penzance, I thought "wow, this tastes like aged Quiet Nights."
If you're looking for a closer match, you're chasing other Germain's blends like their Smoker's Haven Our Best Blend and the elusive Krumble Kake. Honestly, unless you have more money than sense, you're better zeroing in on available Balkans. While most are not like Penzance, they're easier to find and in many cases, much better. Germain's blends are more of a change of pace for me, than something I smoke regularly.