You'll not see a Specialized 29er FS on these shores – I don't think they are doing anything.
You're in the 99th percentile for height – thats taller than 99% of people on the planet – not the UK – the world.
Manufacturers usually make for something close to the 70th percentile – as in from 15th to 85th percentile – the averages. There is almost no profit outside this banding as the market is so small (the very tall and the very small – although since we all start off small, this end is easier to accommodate).
It took me this to realise I was never going to find the bargains and, if I wanted something, it might cost me more. You'll be very hard pushed to find anything comfortable in your price range with those requirements. 29ers (IMHO would suit you more) are in the minority and thus more scarce – the FS side is only now getting sorted.
Save up more, plan a holiday to the USA and come back with more than a smile!