I've restored about 750 unique models so far. There's over 1,000 in the pre-1969 lineup but it's safe to say the easy models to find are behind me.
One model that I haven't come across until recently was a bit of a surprise. It's a member of the Lord Lancaster line, specifically the Lord Lancaster B. It was introduced in 1963 and produced through 1969 - so why has it been so hard to come across? Beats me... but better late than never!