Ages ago I bought some nut bone blanks from ebay.
Can't remember how much but it must have been cheap.
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There were originally 5 in the packet and at x2 per blank there's a total of 10.

What put me off was the fiddly size and no clamp to hold them in place whilst carving took place.
After my brain wave with using perspex and double-sided tape for the fret-board radius...
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Using sandpaper and the 7.25" radius block I now have some nut blanks.
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One at the top is first cab off the rank.
The two bottom are the original plastic ones that they will replace.
...and I was considering buying yet another Tusq nut..
cheers, Mark.