migrate OSC 2.2 to OSC 2.3.x

I am looking for a freelancer who can migrate my osc 2.2 website to the latest osc version. I have installed several addons to my osc 2.2 website, and I know some of them wont work with later osc code. So, when you migrate to the latest version of osc, ALL my website functions MUST be the same. For example, I have an older version of Chemo's SEO URL's and Jacks Header Tags installed, which wont work with later versions of osc (according to the addon history) Obviously I could just upgrade the addons to the latest version, but that would upset my urls and header tags because the newer addons don't keep the same url or header tag structure. You must not, under any circumstances change the existing product url's, header tags or meta tags with your updates, the urls, header tags, meta tags must stay EXACTLY the same, no exceptions! If the project is unclear, just ask any question.