Thanks - both your suggestion and @davewongillies are close ... but my ideal keyboard is still the "87 key" layout with the inverted T, but with 12 function keys on the left. On modern PCs it's hard to live without the F11 and F12 keys.

I'd even settle for a 12 key keypad on the left as well - that might be more doable. Looks like I might have to build this myself from scratch ...