Awning Alerations

davesharpe11

I have a 2012 Kampa Carnival Awning Size 15 (988-1013cm), I would like it enlarged to fit a Swift Conqueror 645 (A frame size 1065cm).  Could anyone recommend a company, advise on costs? 
Its not been used much and if i sell second hand i will get a fraction of what I paid for it and would then have to pay out for a new one.