chepa shock will be more than your £200, and the cost of rebuild at least that again.
Mine was failry cheap as it had cans, did forks with help of mates and didnt have that much race kit and it cost about £800 the first yera, then another £4-500 the second. TBH in hindsight way cheaper and better option to buy one already done - thegre are a few for sale like mine (for cheap money
), Craigs etc