This is an old post, preserved for reference.
The products and services mentioned within are no longer available
SEE UPDATES AT THE END OF THE POST.
2023 Update: Minstrel 2, 3 and 4th PCBs, kits and built and tested boards are available via my SellMyRetro store - https://www.sellmyretro.com/store/tynemouth-software
See this post for more information - http://blog.tynemouthsoftware.co.uk/2023/08/minstrel-3-pcbs-kits-and-built-boards.html