If you check around any shop that can do rearends will be able to handle your job. Be prepared its not cheap .You would have been better off swapping rears . I have seen that gear set installed for about 300.dollars and also know of one that cost 900 dollars. If you cant do it yourself it gets pricey and really not worth it . Sounds like you allready have the gears so you need to find a shop. Ask around and find a good 4X4 shop they do that stuff all day long .
