I’m deep down the rabbit hole now 
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https://www.sapim.be/spoke-calculator
Useful potential calculator for future reference.
I think I’ll order some rims in the New Year or if they go on special and try and source some hubs. I won’t order any spokes until I have the rims and hubs to measure.
Looking at some online pricing, I might be able to get some DT Swiss 350 hubs for ok-ish money. If I do that I could possibly sell the Hunt wheels and recoup the cost of hubs anyway. Decisions for later in the process.