you miss-understood Mixalisen's reply, his idea is to get a complete front end off a bike which uses an Ohlins fork as standard - such as many top spec Ducatis and RSV Aprilias. The reason we say 'complete front end' and not 'just the fork itself' is because a complete front end includes the wheel, spindle, brakes, handlebars and all the fiddly spacers and other bits that you would have to source/make yourself if you only bought a bare fork and tried to re-use the narrow NSR wheel with it.

You need to find an Ohlins fork off a Ducati or whatever and then have the NSR steering stem swapped into the Ohlins triple clamps - it should then slide in just like many other fork conversions.

I have an RVF400 fork in my MC21 - i got the complete front end off an RVF at a breakers yard. I changed the steering stem to an NSR one and in the fork went with no dramas.

As for the valving, you can have it re-valved and re-sprung with all Ohlins internals to suit your lightweight NSR, you just need to find a busniness that can set you up. New Zealand has this dude; http://kiwirider.co.nz/ckt/ for all our Ohlins needs.
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After years of moaning about immigrants now i am one...