Build a Suffolk SS100 - more expensive than a Morgan but not a lot more in Australia as the donor cars are so cheap. I liked the SS100 and one of those would be pretty interesting as well.
Welcome Chris.
What an agreeable problem to have.
I fancy building an SS100 or maybe a Triking when I finally pack it in, it would be a great retirement project. How is Australia about that building kit-cars or one-offs ? The whole business of Australian conformity as seen with the mods that were required for the M3W seemed painful in the extreme.
I wouldn't be put off by scare stories on Morgan build quality. The newer cars are way better built than they used to be back in the day, and very many of the older ones will have been cherished and improved by loving owners, so overcoming any original shortcomings. I bought my 4/4 Sport new in 2011 and ran it for 5 years - as a daily driver so long as it wasn't looking like rain. I put 30 000km on it, and it was 100% reliable and completely trouble free. I sold it after 5 years for very nearly what I paid for it new, in all some of the cheapest and most enjoyable motoring I've ever enjoyed.